Adapt to changed API of MergedByPushOp.Factory#create

Since change I12acf2954 the create method requires the new sha1
of the destination branch.

Update API version to 2.16.11.1, so this change also builds using Maven.

Change-Id: Ibc6f055b76a48acf43bea10b937e15e3ee81c962
2 files changed