Added unit test for kolla_docker
Added unit test for kolla_docker

Added unit test for create container.

Change-Id: If67025791e52581c8853da50623cc9547f4e9298
Partially-Implements: blueprint ansible-unit-tests

dardelean/kolla-ansible,intel-onp/kolla,nihilifer/kolla,rahulunair/kolla,stackforge/kolla,dardelean/kolla-ansible,dardelean/kolla-ansible,coolsvap/kolla,mandre/kolla,openstack/kolla,rahulunair/kolla,mandre/kolla,coolsvap/kolla,GalenMa/kolla,intel-onp/kolla,stackforge/kolla,stackforge/kolla,openstack/kolla,mandre/kolla,coolsvap/kolla,GalenMa/kolla,nihilifer/kolla,mrangana/kolla,mrangana/kolla