5.1.1 Updates and JGit migration. Removed bamboo.git dependencies.
5.1.1 Updates backmerged:  JGit migration and removed bamboo.git dependencies.
Added more dependencies and resloved null error regarding email occuring in GerritService.
Readme updates for 1.30 release
Merge commit Readme updates into Bamboo-4.2.1-5.0.1