Make jenkins own /opt/git in ha job

This was missed when the chown was added to the other jobs
Iebe3b5f194682e759266553b0f1e861f2958b048, possibly because
it didn't exist at the time.

Change-Id: I3d5a9e97eee35975518e8a655dc2a190f40f0d4f
Merge "Make jenkins own /opt/git in ha job"