Glance manage should parse glance-api.conf
Glance manage should parse glance-api.conf

glance-manage does not currently parse glance-api.conf, when
glance-registry.conf is present. Currently it's parsed conditionally.
But, when some configs from glance-api.conf are required, we would
need parse them both.
eg. CONF.swift_store_user, CONF.swift_store_key in glance-api.conf

Fixes bug #1225863

Change-Id: I553c1bb460229489b38a57d9c91995816bfe09ee

cloudbau/glance,klmitch/glance,cloudbau/glance,tanglei528/glance,redhat-openstack/glance,darren-wang/gl,ozamiatin/glance,paramite/glance,saeki-masaki/glance,saeki-masaki/glance,scripnichenko/glance,vuntz/glance,sigmavirus24/glance,wkoathp/glance,dims/glance,takeshineshiro/glance,JioCloud/glance,jumpstarter-io/glance,dims/glance,paramite/glance,sigmavirus24/glance,ozamiatin/glance,scripnichenko/glance,stevelle/glance,akash1808/glance,klmitch/glance,kfwang/Glance-OVA-OVF,wkoathp/glance,rajalokan/glance,JioCloud/glance,openstack/glance,stevelle/glance,jumpstarter-io/glance,tanglei528/glance,redhat-openstack/glance,darren-wang/gl,ntt-sic/glance,kfwang/Glance-OVA-OVF,ntt-sic/glance,rajalokan/glance,akash1808/glance,takeshineshiro/glance,openstack/glance,openstack/glance,vuntz/glance