Use parent pom 3.43 - fix javadoc on JDK 11.0.3
Use parent pom 3.43 - fix javadoc on JDK 11.0.3

Jesse Glick resolved the root problem in the parent pom so that I can
compile and test on Java 11 and build javadoc as well.  Thanks Jesse!

v1v/git-plugin,martinda/git-plugin,v1v/git-plugin,v1v/git-plugin,martinda/git-plugin,MarkEWaite/git-plugin,MarkEWaite/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,jenkinsci/git-plugin,jenkinsci/git-plugin,martinda/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin