Add stub for virsh plugin '--prefix' argument
Add stub for virsh plugin '--prefix' argument

RHOSINFRA-529

Change-Id: Iea03acff6218817e140d82879c291eeb73904152

redhat-openstack/infrared,okolisny/InfraRed,okolisny/InfraRed,redhat-openstack/infrared,okolisny/InfraRed,redhat-openstack/infrared