In the current doc, the command examples are like
"os server create" but the acutal command should
be started with "openstack" instead of "os", it
is misleading to first time users.
Change-Id: I80c96f0938cec382f2f714a500138bd5a2c81aa0
Added new command 'hypervisor stats show' for displaying
the hypervisor stats over all compute nodes.
Change-Id: I4f98c69135b04d4f6cea67cd6350d5d99fb79dba
Partial-Bug: #1423748