Allow users the ability to update the instance name

Implements: blueprint update-instance-name

This review provides the user the ability to update the instance
name or/and configuration using the trove client.

Change-Id: If404d4d47c83ca36d7a08ed2a8f1f8dddb7ed677
Changes configuration_ref to configuration

Closes bug: 1318258

Compat cli used old configuration_ref parameter

Change-Id: Ia6942186666d1022d4ad67880df90a36785721ce
Merge "Changes configuration_ref to configuration"
Merge "Allow users the ability to update the instance name"