[stable10] Backport of Add config flag to skip avatar repair step if already applied
[stable10] Backport of Add config flag to skip avatar repair step if already applied

Add config flag to skip avatar repair step if already applied.

Signed-off-by: Sujith H <f003c101b6db321bb70f3b324d211f3cd092837a@owncloud.com>

phil-davis/core,owncloud/core,owncloud/core,owncloud/core,owncloud/core,owncloud/core