Merge branch 'stable-2.15'
* stable-2.15:
Upgrade to latest bazlets
Format build files with buildifier 0.15.0
Close JDBC objects in try-with-resources
Avoid NPE when trying to delete changes for a project
Update bazlets to latest stable-2.14 to use 2.14.11 API
Update bazlets to latest stable-2.14 to use 2.14.10 API
Update bazlets to latest stable-2.14 to use 2.14.9 API
Move assertion on protected projects into ProtectedProjects
Improve error message when protected project cannot be deleted
Update bazlets to latest revision on stable-2.15
Make DeleteProject a singleton
Move checks for All-Users and All-Projects to dedicated class
Do not allow to delete All-Users project
DeleteAction: Improve delete button label
Update to latest bazlets on stable-2.14
Add TimeMachine class for system clock get/set use
Retrieve changes to delete from database
Change-Id: Ic5b0e00659411745a4a878d61048d28d0e4e8700
