Fix issues introduced by https://review.opendev.org/#/c/735648
with extra 'ceph-' in service_account and security context not
rendered for keyring generator containers.
Change-Id: Ie53b3407dbd7345d37c92c60a04f3badf735f6a6
Signed-off-by: Andrii Ostapenko <andrii.ostapenko@att.com>