fix #143 java compiler warning

[chcg]

fixes #143

08:24:17 [WARNING] /home/jenkins/agent/workspace/TestResultReporter-plugin_master/src/main/java/org/jenkinsci/plugins/JiraTestResultReporter/config/SelectableArrayFields.java:[169,60] non-varargs call of varargs method with inexact argument type for last parameter;
08:24:17 cast to java.lang.Object for a varargs call
08:24:17 cast to java.lang.Object[] for a non-varargs call and to suppress this warning

Maybe still of interest to analyse:

08:24:17 [INFO] /home/jenkins/agent/workspace/TestResultReporter-plugin_master/src/main/java/org/jenkinsci/plugins/JiraTestResultReporter/JiraTestAction.java: Some input files use or override a deprecated API.
08:24:17 [INFO] /home/jenkins/agent/workspace/TestResultReporter-plugin_master/src/main/java/org/jenkinsci/plugins/JiraTestResultReporter/JiraTestAction.java: Recompile with -Xlint:deprecation for details.
08:24:17 [INFO] /home/jenkins/agent/workspace/TestResultReporter-plugin_master/src/main/java/org/jenkinsci/plugins/JiraTestResultReporter/JiraTestDataPublisher.java: Some input files use unchecked or unsafe operations.
08:24:17 [INFO] /home/jenkins/agent/workspace/TestResultReporter-plugin_master/src/main/java/org/jenkinsci/plugins/JiraTestResultReporter/JiraTestDataPublisher.java: Recompile with -Xlint:unchecked for details.

Testing done

See https://github.com/jenkinsci/JiraTestResultReporter-plugin/pull/171/checks?check_run_id=31937212888
Security Scan seems to fail due to some other reason (maven download)

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[basil]

One minor suggestion.