Show traceback info if a functional test fails
Show traceback info if a functional test fails

Fixes bug 1218277

Change-Id: I2d1cb7f5748dba203f72f2996c2228f7bfed7987

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