Fix method's doc typo errors
Fix method's doc typo errors

And fix imports not in alphabetical order issue.

Signed-off-by: JUNJIE NAN <46023c7d0dc460c3914d3d6970f01899873b19a3@cn.ibm.com>

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