Remove Java 7 MaxPermSize arg in Jenkinsfile
Remove Java 7 MaxPermSize arg in Jenkinsfile

Using jdk8 for all builds

jacob-keller/git-plugin,v1v/git-plugin,kzantow/git-plugin,recena/git-plugin,MarkEWaite/git-plugin,MarkEWaite/git-plugin,recena/git-plugin,martinda/git-plugin,kzantow/git-plugin,MarkEWaite/git-plugin,MarkEWaite/git-plugin,jacob-keller/git-plugin,kzantow/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,recena/git-plugin,jenkinsci/git-plugin,v1v/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,jacob-keller/git-plugin,jenkinsci/git-plugin,v1v/git-plugin