[10.2.1] Backport to Fix response when user is removed from group
[10.2.1] Backport to Fix response when user is removed from group

When user is successfully removed from the group
fix message that is sent by server.

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

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