[Updated] go_to_theater taskStart method to spawn the theater, mobiles,
active area and waypoint for the player.
[Changed] spawnSceneObject in director manager to return nil if object
spawning fails.

Change-Id: I1544609ebe8368c2f1e2994fdc687c256d21a3f6
Merge "[Updated] go_to_theater taskStart method to spawn the theater, mobiles, active area and waypoint for the player. [Changed] spawnSceneObject in director manager to return nil if object spawning fails." into unstable