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 am: f5eb536d90
am: 27bdac8e05

Change-Id: I5bacdd7761682d68361193b997a7dc7846228008