Added statistics for received packets in and for sent addFlows to the RPC and Data Store drop tests. BUG-991 (https://bugs.opendaylight.org/show_bug.cgi?id=991)

Change-Id: I3a99bb81c8eadf87d731715b1f40f36af9734ba9
Signed-off-by: Jan Medved <jmedved@cisco.com>
Merge "Added statistics for received packets in and for sent addFlows to the RPC and Data Store drop tests. BUG-991 (https://bugs.opendaylight.org/show_bug.cgi?id=991)"