Enable certificate check for glance_store+swift
Enable certificate check for glance_store+swift

Disable insecure option for glance_store with
swift backend when tls is enabled.
Specify swift_store_cacert option.

Change-Id: Ia1e8f596c95dd7b6e63cb21a94c8316dc71bf945

nawawi/openstack,openstack-dev/devstack,openstack-dev/devstack,nawawi/openstack