LU-11003 ldlm: don't add canceling lock back to LRU

LU-11003 ldlm: don't add canceling lock back to LRU

When lock is converted check it is not canceling before
adding it back to LRU.

Signed-off-by: Mikhail Pershin <mike.pershin@intel.com>
Change-Id: I278389f2a23b304d812f82ffb2dcee2ca70f5b21
Reviewed-on: https://review.whamcloud.com/32692
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>