Fix wrong Jenkins envirenment GIT_BRANCH

Remove "origin/" from "origin/develop"
Initial enabling of findbugs
Gradle cleanup - standardize a lot of config into a common.gradle that is imported everywhere
Gradle update from 1.8 to 1.10
Merge #877 from @mkalb - GIT_BRANCH tweak

Conflicts:
	engine/build.gradle - benign
Merge latest from upstream
Exclude protobuf from PMD scans