Merge "OMXNodeInstance: use a lock in freeNode" into lmp-dev am: 288566faba  -s ours am: 2a5e425ab4 am: 96c2fafc29 am: b9da9fc1aa am: ee22f8a68e am: efd26f8a61
am: 2d073bdd1e

Change-Id: I6e1fc676ee614b13229f1846f601fe26eb69ff62