CodeGenerator: Fix generation of FindMODULE prefix for headers

Change-Id: If59ee0e10ed979fdcde5d1d26a50cb276a55e353
MediaObjectImpl: Add method to get object childs

Change-Id: Idc09a6697ed3b324d6ef55342492746a2de9885f
MediaObjectImpl: Add name property

Change-Id: I382c489f1a304a37ad2b2dfc2e40874170ce1368