[DLM] block scand during recovery [1/6]

Don't let dlm_scand run during recovery since it may try to do a resource
directory removal while the directory nodes are changing.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --cc fs/dlm/lock.c
Simple merge

diff --cc fs/dlm/lock.h
Simple merge

diff --cc fs/dlm/lockspace.c
Simple merge