Code changed in jenkins
User: Kristin Whetstone
JENKINS-35283: Update to parent POM
Updated to the parent pom and the Jenkins version to 1.625.3. There were some changes in the findbugs-maven-plugin settings, but running tests with these changes didn't produce any failures.
- Revert jenkins.version to and add java.version
Changed the jenkins.version to an older LTS line to get the plugin more current. The 1.480.3 line is no longer found in the tagged releases in GitHub, so it'd be incredibly difficult to diagnose any core issues found with that version. Also, I kept the java version at 6 to match the requirement at 1.609.3.
Change `http` to `https`