When driver load we allow to override option unrelated to the driver and
to set option useless for the driver.
This change validates the query string when the driver load to report as
soon as possible invalid options. And allow to override only option
of the driver option group (ie: [oslo_messaging_<driver_name>].
Related-bug: #1666903
Change-Id: Iaf23f773279c10bf37d545883ada7c2f6a9ffbbf