Correcting exception handling in glance-manage
Correcting exception handling in glance-manage

Fixes bug 884432

Change-Id: I76c0a97e502dd05b4c56c84fa640d1f0e0cd48ae

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