Reformat openstack-common.conf
Reformat openstack-common.conf

Use the new 'module' option in openstack-common.conf which is a
multi-string option, allowing each module name to be placed on a
separate line.

This makes it much easier to review changes to the modules list.

Change-Id: I218601a3720287071f05b9f2f624c1de4442d34f

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