WaitCondition Count property is now updatable

The Count property of WaitCondition resource was modified to be
updatable.
Now, when that property is updated, the WaitCondition and the associated
WaitConditionHandle are no longer being regenerated.

Change-Id: If234b7a1400ff1b2c17fc24c436d8f64f4b1fd88
Closes-Bug: #1228362
Merge "WaitCondition Count property is now updatable"