[BugFix] Add ability to install tempest in docker
[BugFix] Add ability to install tempest in docker

Change-Id: I07b677411ccad44ca34baba85820626befe06f3b
Closes-Bug: #1493359

amit0701/rally,afaheem88/rally,group-policy/rally,openstack/rally,vganapath/rally,amit0701/rally,openstack/rally,paboldin/rally,afaheem88/rally,gluke77/rally,eayunstack/rally,aforalee/RRally,redhat-openstack/rally,eayunstack/rally,eayunstack/rally,gluke77/rally,vganapath/rally,eonpatapon/rally,aplanas/rally,openstack/rally,vganapath/rally,group-policy/rally,paboldin/rally,yeming233/rally,gluke77/rally,cernops/rally,aplanas/rally,cernops/rally,gluke77/rally,group-policy/rally,yeming233/rally,vganapath/rally,openstack/rally,amit0701/rally,eonpatapon/rally,aforalee/RRally,redhat-openstack/rally,paboldin/rally