Return simplified query result
Return simplified query result

This patch added a boolean parameter 'simplified' for
search, with this flag set, we only return the source
data to caller, which they really care, projects like
Nova can handle them easier than the nested data.

Closes-Bug: #1671684

Change-Id: Id2d3b0a74a857ad98b4570c7ea794d2515f7d5ef

openstack/python-searchlightclient,openstack/python-searchlightclient