This patch introduces the instrumentation of redfish object's
method invocation from ``ilo.client.IloClient`` object. When
a method is invoked on client, based on the target hardware
the execution of that corresponding method bestows on RIBCL,
RIS or Redfish. Again, when the context is Redfish then there
RIBCL can remain enabled/disabled. In case of RIBCL enabled,
we fall back to RIBCL for any method invocation which is not
(yet) implemented in Redfish. For RIBCL being disabled, we
raise ``NotImplementedError``.
This also introduces a parameter in client constructor named
'use_redfish_only' which when set to True will force the use
of redfish. Default value is False.
Change-Id: Iaf261a17da137a6fa49e62d9ff2a7cf34c97c2e3
Partial-Bug: 1646685
4db1e580e2