Fix oslo modules description
Fix oslo modules description

This patch fixes the README files in openstack/common subdirectory.

Change-Id: I15258570259601d4bb051dfdd86e62dccf71fd79

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