Fix user/policy_types.rst error
Fix user/policy_types.rst error

property "distroy_after_deletion" should be "destroy_after_deletion"
option:"-F" should be "-f"

Change-Id: I8a77d2456e18516c56be44261402a467b7876040

openstack/senlin,openstack/senlin,stackforge/senlin,stackforge/senlin,openstack/senlin