Fix ceph-deploy 'branch' override
Fix ceph-deploy 'branch' override

Default ceph-deploy override template defines devcommit which makes
'branch' overrides in the qa-suite useless since it only picksup one option
Remove the devcommit overrides from the template and use that as
default in case no other 'branch' override exist.

Signed-off-by: Vasu Kulkarni <fdfdb2cd979b7b8f17791cc46d595851145a3915@redhat.com>

SUSE/teuthology,dmick/teuthology,SUSE/teuthology,dmick/teuthology,ceph/teuthology,dmick/teuthology,SUSE/teuthology,ceph/teuthology,ktdreyer/teuthology,ktdreyer/teuthology