dlm: change lock time stamping

Use ktime instead of jiffies for timestamping lkb's.  Also stamp the
time on every lkb whenever it's added to a resource queue, instead of
just stamping locks subject to timeouts.  This will allow us to use
timestamps more widely for debugging all locks.

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

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

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

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

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