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

Change-Id: Ib21d56a7d64fbce2c5d2d55378b1eb7e5cb6f4c9