Trove Details pages should be plural

Currently the Trove Database Detail and the
Database Backup Detail pages are using the
non plural 'Detail'.

To be consistent with other dashboard screens
such as compute instances / images etc
we should use 'Details' rather than 'Detail'

Change-Id: I7ed63e68f8d8b7712d690639cd485b420406f8ef
Closes-Bug: #1336851
Merge "Trove Details pages should be plural"