Optimize get_by_instance_uuid

Previously this method was issuing two requests: One filtering the node
by instance_uuid and another to get all the informations about that
node. This patch optimize it by using the /detail flag which will filter
the node by the instance_uuid and return all informations in one request.

Change-Id: Ia22c5012af12b131d5a6601653d704b5a9f39d82
Merge "Optimize get_by_instance_uuid"