Correct format of schema-image.json.
Correct format of schema-image.json.

Correct the JSON format of schema-image.json. Fixes issues where
glance-api won't start due to invalid JSON in this file.

Fixes LP Bug #1003470.

Change-Id: Ibacc49f2c45e233bd6ad25b3334e013acaae8339

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