Edit variable mode and remove variable in openstackwatch.ini.

 * modules/jeepyb/templates/openstackwatch.ini.erb

Change-Id: Iff9a211c794be38324f6968cea77b87de7709b27
Reviewed-on: https://review.openstack.org/26526
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins