Changing SimpleBroadcastHandler so that it's disabled by default to fix stability issues with >10 switches.

Change-Id: I6ac1c15e431760c97348bc466a9783f25f6d9fee
Signed-off-by: Colin Dixon <ckd@us.ibm.com>
Merge "Changing SimpleBroadcastHandler so that it's disabled by default to fix stability issues with >10 switches."