Add datatore/version name into configurations response

Reasons:
 - Both ConfigurationView and DetailedConfigurationView
   for configuration-groups return only the Datastore
   Version ID and not human the readable Datastore Name / Version

Changes:
 - adding datastore version name to:
   - configuration-create;
   - configuration-list;
   - configuration show responses.
 - tests;

Change-Id: I8fbefd57d40838dafcead0077bfbc6b49c27a8eb
Closes-Bug: #1326584