KurentoException: Add getType

Change-Id: I73e5d32d8fb6f50f151ec0cd61efd4dc1b7a6c86
KurentoException: Add Malformed transaction exception

Change-Id: Ia6216ad75219b826bc721fd29fe99ab6662ca630
ModuleManager: Improve object not available exception

Change-Id: I4f610324387feebfb755892706eff0b8db006424