Bug 2134: Fix intermittent RaftActorTest failure

We need to wait for akka's recovery to complete before we perform our
tests as akka's recovery runs async and may interfere with our tests and
cause them to fail if the timing is right. This was seen once on
jenkins.

Change-Id: Ia748d17f662d64235881005e6522441b384c78ea
Signed-off-by: tpantelis <tpanteli@brocade.com>