Remove test calls to isKubernetesCI()

No benefit to calling a method that always returns false.  The tests now
require a docker environment, so they cannot be run on a Kubernetes agent.

(cherry picked from commit 2ac8d07)

Author: MarkEWaite

src/test/java/org/jenkinsci/plugins/gitclient/verifier/AcceptFirstConnectionVerifierTest.java

@@ -5,7 +5,6 @@
 import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.io.FileMatchers.anExistingFile;
-import static org.jenkinsci.plugins.gitclient.verifier.KnownHostsTestUtil.isKubernetesCI;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
@@ -54,9 +53,6 @@ public void testVerifyHostKeyOption() throws IOException {
 
     @Test
     public void testVerifyServerHostKeyWhenFirstConnection() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         File file = new File(testFolder.getRoot() + "path/to/file");
         AcceptFirstConnectionVerifier acceptFirstConnectionVerifier = spy(new AcceptFirstConnectionVerifier());
         when(acceptFirstConnectionVerifier.getKnownHostsFile()).thenReturn(file);
@@ -81,9 +77,6 @@ public void testVerifyServerHostKeyWhenFirstConnection() throws Exception {
 
     @Test
     public void testVerifyServerHostKeyWhenSecondConnectionWithEqualKeys() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         String hostKeyEntry =
                 "|1|FJGXVAi7jMQIsl1J6uE6KnCiteM=|xlH92KQ91GuBgRxvRbU/sBo60Bo= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEmKSENjQEezOmxkZMy7opKgwFB9nkt5YRrYMjNuG5N87uRgg6CLrbo5wAdT/y6v0mKV0U2w0WZ2YB/++Tpockg=";
 
@@ -112,9 +105,6 @@ public void testVerifyServerHostKeyWhenSecondConnectionWithEqualKeys() throws Ex
 
     @Test
     public void testVerifyServerHostKeyWhenHostnameWithoutPort() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         String hostKeyEntry =
                 "github.com ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEmKSENjQEezOmxkZMy7opKgwFB9nkt5YRrYMjNuG5N87uRgg6CLrbo5wAdT/y6v0mKV0U2w0WZ2YB/++Tpockg=";
         File mockedKnownHosts = knownHostsTestUtil.createFakeKnownHosts(hostKeyEntry);
@@ -138,9 +128,6 @@ public void testVerifyServerHostKeyWhenHostnameWithoutPort() throws Exception {
 
     @Test
     public void testVerifyServerHostKeyWhenSecondConnectionWhenNotDefaultAlgorithm() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         String fileContent =
                 """
                 github.com,140.82.121.4\
@@ -201,9 +188,6 @@ public void testVerifyServerHostKeyWhenSecondConnectionWithNonEqualKeys() throws
 
     @Test
     public void testVerifyServerHostKeyWhenConnectionWithAnotherHost() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         String bitbucketFileContent =
                 """
                 |1|HnmPCP38pBhCY0NUtBXSraOg9pM=|L6YZ9asEeb2xplTDEThGOxRq7ZY=\
@@ -236,9 +220,6 @@ public void testVerifyServerHostKeyWhenConnectionWithAnotherHost() throws Except
 
     @Test
     public void testVerifyServerHostKeyWhenHostnamePortProvided() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         String fileContent =
                 """
                 |1|6uMj3M7sLgZpn54vQbGqgPNTCVM=|OkV9Lu9REJZR5QCVrITAIY34I1M=\

src/test/java/org/jenkinsci/plugins/gitclient/verifier/KnownHostsFileVerifierTest.java

@@ -68,9 +68,6 @@ public void connectWhenHostKeyNotInKnownHostsFileForOtherHostNameThenShouldFail(
 
     @Test
     public void connectWhenHostKeyProvidedThenShouldNotFail() throws IOException {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         KnownHostsFileVerifier knownHostsFileVerifier = spy(new KnownHostsFileVerifier());
         when(knownHostsFileVerifier.getKnownHostsFile()).thenReturn(fakeKnownHosts);
 
@@ -91,9 +88,6 @@ public void connectWhenHostKeyProvidedThenShouldNotFail() throws IOException {
 
     @Test
     public void connectWhenHostKeyInKnownHostsFileWithNotDefaultAlgorithmThenShouldNotFail() throws IOException {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         fakeKnownHosts = knownHostsTestUtil.createFakeKnownHosts(
                 "fake2.ssh",
                 "known_hosts_fake2",

src/test/java/org/jenkinsci/plugins/gitclient/verifier/ManuallyProvidedKeyVerifierTest.java

@@ -60,9 +60,6 @@ public void connectWhenHostKeyProvidedForOtherHostNameThenShouldFail() throws Ex
 
     @Test
     public void connectWhenHostKeyProvidedThenShouldNotFail() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         ManuallyProvidedKeyVerifier verifier = new ManuallyProvidedKeyVerifier(hostKey);
         ManuallyProvidedKeyVerifier.ManuallyProvidedKeyJGitHostKeyVerifier jGitHostKeyVerifier =
                 (ManuallyProvidedKeyVerifier.ManuallyProvidedKeyJGitHostKeyVerifier)
@@ -100,9 +97,6 @@ public void connectWhenWrongHostKeyProvidedThenShouldFail() throws Exception {
 
     @Test
     public void connectWhenHostKeyProvidedWithPortThenShouldNotFail() throws Exception {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
         String key =
                 "github.com:22 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEmKSENjQEezOmxkZMy7opKgwFB9nkt5YRrYMjNuG5N87uRgg6CLrbo5wAdT/y6v0mKV0U2w0WZ2YB/++Tpockg=";
         HostKeyVerifierFactory verifier = new ManuallyProvidedKeyVerifier(key);

src/test/java/org/jenkinsci/plugins/gitclient/verifier/NoHostKeyVerifierTest.java

@@ -2,7 +2,6 @@
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
-import static org.jenkinsci.plugins.gitclient.verifier.KnownHostsTestUtil.isKubernetesCI;
 
 import hudson.model.StreamBuildListener;
 import hudson.model.TaskListener;
@@ -24,10 +23,6 @@ public void assignVerifier() {
 
     @Test
     public void verifyServerHostKey() throws IOException {
-        if (isKubernetesCI()) {
-            return; // Test fails with connection timeout on ci.jenkins.io kubernetes agents
-        }
-
         NoHostKeyVerifier acceptFirstConnectionVerifier = new NoHostKeyVerifier();
 
         KnownHostsTestUtil.connectToHost(