Remote fallback routes.
Merge pull request #779 from martinpovolny/route_noleg

Remote fallback routes.
Removed attr_accessor in order for the methods to be called

The following methods-
:v_derived_storage_used
:min_v_derived_storage_used
:max_v_derived_storage_used

that populate the trending data for datastore were not being called
earlier due to attr_accessor being specified.

https://bugzilla.redhat.com/show_bug.cgi?id=1089625