Replace deprecated library function os.popen() with subprocess
Replace deprecated library function os.popen() with subprocess

os.popen() is deprecated since python 2.6. Resolved with use of
subprocess module.

Change-Id: Ifa5f6bbfabf2d5ebfdbee21920aa12c0a8e30517
Closes-Bug: #1529836

tengqm/senlin-container,stackforge/senlin,openstack/senlin,openstack/senlin,stackforge/senlin,tengqm/senlin-container,openstack/senlin