ASACORE-51: Cease automagically emmiting PropertiesChanged in certain cases.

Don't automatically send the PropertiesChanged signal if a Set
property method call is received.  The new value may not elicit an
actual change or the application may prefer to accumulate a few
changes before sending out the change notification.

Change-Id: I3f1274e342e8c9167464df31d480d68e0fedca3f
Signed-off-by: Steve Kinneberg <stevek@qce.qualcomm.com>
Merge "ASACORE-51: Cease automagically emmiting PropertiesChanged in certain cases." into feature/asacore47