* stable-3.1:
CreateChange#execute: Remove declaration of unthrown InvalidChangeOperationException
Eclipse: Ignore compilation warnings in modules/jgit
Update jgit to the latest master revision
Clean up Polymer1 and Polymer2 separation
Fix warning id assigned to anchor already in use: container.replica
Upgrade gitiles-servlet and blame-cache to 0.3-5
InMemoryModule: Use ReplicaUtil.isReplica
Set version back to 3.1.0-SNAPSHOT
Change-Id: I6016568b38ad27bc918509b35b0739f94972b8f3