Client Side
Locations Management
Partial rollback of previous commit.

Client's details are no longer returned within each and every client's
locations.
Instead, upon client's locations retrieval, the LocationsController
issues a get request to the backend in order to retrieve client's
details.

Server Side
Clients Controller
Added Show action

Specs
Added specs for ClientsController#Show. Both success and failure
scenarios have been covered.

Cleaned specs for InterventionsController#Show.