LU-11836 ldlm: don't convert wrong resource

LU-11836 ldlm: don't convert wrong resource

During enqueue the returned lock may have different resource
and local client lock replaces resource too. But there is
a valid race with bl_ast and reply from server, so BL AST
may come earlier and find client lock with old resource.
In that case ldlm_handle_bl_callback() should proceed with
normal cancel and don't use cancel_bits for lock convert.

Signed-off-by: Mikhail Pershin <mpershin@whamcloud.com>
Change-Id: Ib7fd98ce73821b1e3207e7f2bfba0e0acfdc2380
Reviewed-on: https://review.whamcloud.com/34264
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>