Update cluster event command example
Update cluster event command example

Update output information for list and show command example.

Change-Id: Idb4f925490e828809f0be0bd527499f9733e5b3e
Signed-off-by: blkart <1085ae7ac5d420d52a04a26b37297224b6df9d8b@gmail.com>

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