Fixed typo in getting started doc
Fixed typo in getting started doc

The policy-show command was mistakenly input as policy-create.

Change-Id: I2582cb45f14e319522668aef854f7610f6e84c2e

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