Fix the kolla to find the docker image folder in virtualenv
Fix the kolla to find the docker image folder in virtualenv

Closes-Bug:#1530256
Change-Id: I05f10d13e7ba1e2b985c2944aec71ce55630442b

intel-onp/kolla,mandre/kolla,coolsvap/kolla,intel-onp/kolla,GalenMa/kolla,limamauricio/mykolla,toby82/kolla,limamauricio/mykolla,dardelean/kolla-ansible,limamauricio/mykolla,stackforge/kolla,mandre/kolla,openstack/kolla,stackforge/kolla,mandre/kolla,coolsvap/kolla,rahulunair/kolla,rahulunair/kolla,mrangana/kolla,openstack/kolla,nihilifer/kolla,tonyli71/kolla,dardelean/kolla-ansible,dardelean/kolla-ansible,coolsvap/kolla,negronjl/kolla,mrangana/kolla,stackforge/kolla,negronjl/kolla,GalenMa/kolla,toby82/kolla,negronjl/kolla,tonyli71/kolla,toby82/kolla,nihilifer/kolla