Don't generate redundant change notifications for identity properties
Don't generate redundant change notifications for identity properties

When setting an identity property, don't generate a change
notification if the new value is the same as the old value.  Change
notifications can be expensive to process when there are many plug-ins
that are listening.

Change-Id: I7795563cd1f38975ea3cfeaa483eaa307d814f77

secure-endpoints/netidmgr,secure-endpoints/netidmgr,secure-endpoints/netidmgr,secure-endpoints/netidmgr,secure-endpoints/netidmgr