Revert "Remove implicit job sharing between group members."

We need to undo the undoing of the implicit group perms to allow for BZ#1000861

Change-Id: Iab1c299edadf769e18378543755a24c8dbe5e99a
This adds a config item to enable/disable the implicit group job permissions.

Bug:1000861
Change-Id: Icf8e1e75870961c59d265d952efef0bc436276da
Merge changes Icf8e1e75,Iab1c299e into develop

* changes:
  This adds a config item to enable/disable the implicit group job permissions.
  Revert "Remove implicit job sharing between group members."