Fixes Heat tempest issue due to hardcoded qcow2 extension
Fixes Heat tempest issue due to hardcoded qcow2 extension

The orchestration image_ref is set incorrectly if the extension is not
qcow2, as a result tempest cannot find the Glance image and the
associated tests fail.

This patch fixes the issue by handling any extension.

Change-Id: I32ffe021714590a1b1bab232b1d4f5da238bd4d8
Closes-Bug: #1402774

dirkmueller/devstack,herrsechs/devstack,mmasaki/devstack,j4/devstack,group-policy/devstack,CloudServer/devstack,parul24/devstack,wenhuizhang/devstack,varunarya10/devstack,parul24/devstack,liuquansheng47/devstack,bljgaurav/openstack-test,upadhyay-prashant/devstack,bswartz/devstack,atulpatil301/devstack,TwinkleChawla/devstack,samgoon/devstack,group-policy/devstack,promptworks/devstack,bigswitch/devstack,pombredanne/devstack,samgoon/devstack,j4/devstack,affo/devstack,flavio-fernandes/devstack,neerja28/Devstack_GlusterFS,costingalan/devstack,BSJAIN92/OpenStack,pczerkas/devstack,bljgaurav/openstack-test,richliu/devstack,rushiagr/devstack,noironetworks/devstack,TwinkleChawla/devstack,prithivm/branch01,mc2014/devstack,prithivm/branch01,bigswitch/devstack,sc68cal/devstack,HPCHub/devstack,sequenceiq/devstack,ozamiatin/devstack,mc2014/devstack,vishnugonela/devstack,sequenceiq/devstack,nuxeh/devstack,atulpatil301/devstack,kplus/devstack-moonshot,andrewrothstein/devstack,pacinete/devstack,Mahito/devstack,vsham20/devstack,dirkmueller/devstack,olivierlemasle/devstack,NaokiMiyata/devstack,CloudServer/devstack,mssumanth/devstack,avvocatodemarchis/devstack,pacinete/devstack,noironetworks/devstack,sc68cal/devstack,eharney/devstack,vsham20/devstack,olivierlemasle/devstack,bq-xiao/devstack,herrsechs/devstack,wenhuizhang/devstack,bswartz/devstack,mmasaki/devstack,NaokiMiyata/devstack,ozamiatin/devstack,dtroyer/devstack,neerja28/Devstack_GlusterFS,eharney/devstack,affo/devstack,rushiagr/devstack,Mahito/devstack,flavio-fernandes/devstack,pombredanne/devstack,mssumanth/devstack,varunarya10/devstack,HPCHub/devstack,avvocatodemarchis/devstack,LoHChina/devstack,LoHChina/devstack,promptworks/devstack,bq-xiao/devstack,kplus/devstack-moonshot,nuxeh/devstack,liuquansheng47/devstack,openstack-dev/devstack,pczerkas/devstack,nawawi/openstack,costingalan/devstack,dtroyer/devstack,thomasem/devstack,nawawi/openstack,andrewrothstein/devstack,thomasem/devstack,richliu/devstack,openstack-dev/devstack,vishnugonela/devstack,upadhyay-prashant/devstack,BSJAIN92/OpenStack