restapi: Make RSDL Meta-Data Context-Agnostic

We currently maintain two entry points to ovirt-api:

.../ovirt-engine/api
.../api (for backwards compatibility).

This patch solves the problem or RSDL meta-data not loaded
properly for the context: .../api

Change-Id: I25b9f192108c85a6a05620b91bca184e7766be78
Signed-off-by: Ori Liel <oliel@redhat.com>