Branch b1_4

Branch b1_4
Description: If an OST is inactive, its locks might reference stale inodes.
Details    : lov_change_cbdata() must iterate over all namespaces, even if
             they are inactive to clear inode references from the lock.
	     Otherwise we get stale locks referencing random memory (possibly
	     not even an inode) when the locks drop off the LRU.
b=7039
r=alex