The driver is loaded, then terminated whenever a request is issued.
This behavior causes termination of the Octavia listener which is
responsible to the processing of the driver status updates and
statistics processing.
The following change implements an agent which will execute the
listener.
Change-Id: I566aaa65df4ba7455577a539aa9eebb6cc36a099
(cherry picked from commit 24e93461d0)
bac9c058e5