return sample info when creating sample with CLI

It will return nothing after creating a sample successfully with
ceilometer CLI. The information of the sample created should be return,
like other creating commands, such as "ceilometer alarm-create".

Change-Id: I60229fefa91de83e4b715cf4f92d3650e0a0d162
Closes-bug: #1267713
Merge "return sample info when creating sample with CLI"