Backup geowiki's data-private bare repository

The bare repository is not in gerrit, as it contains "foundation only"
data, and we do not trust gerrit to keep it private. So we backup the
repository separately.

Change-Id: I1ecffb8fbef9c9652c528a401f853e2b83bb2860
Merge "Backup geowiki's data-private bare repository" into production