Display trove instance hostname if available

Trove can now be integrated with designate, the instance will
have a hostname instead of ip. If the integration is not enabled
the ip would be available in the instance info.

Change-Id: I7173f4437e78dd45f8f99d5c9dd80ab86869e943
Closes-Bug: #1262777
Updating tutorial doc for dashboard loading

Changing tutorial to use the newer method for loading dashboards.

The tutorial needs a new revision in general, but that is beyond
the scope of this change.

Closes-bug: #1277325
Change-Id: Ie197b5ad9aafa125235a839fbcc7cd95e352e96a
Merge "Display trove instance hostname if available"
Merge "Updating tutorial doc for dashboard loading"