Improve display of flavor information for trove

Trove database instances display size / flavor
information in the details view different to
how it is display for a nova instance.

Rearranged the details view to have a 'Specs'
section that contains Flavor, RAM and Volume
Size information

Change-Id: I45b5a78dc80902fa1ef6174ea534ebb06d5c01e3
Closes-Bug: #1340913
Merge "Improve display of flavor information for trove"