disable error output check when running with real browsers

Author: rbri

src/test/java/org/htmlunit/WebTestCase.java

@@ -41,6 +41,7 @@
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.SerializationUtils;
 import org.htmlunit.junit.BrowserVersionClassTemplateInvocationContextProvider;
+import org.htmlunit.junit.ErrorOutputChecker;
 import org.htmlunit.junit.SetExpectedAlertsBeforeTestExecutionCallback;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.AfterEach;