ocfs2: Attach the connection to the lksb

We're going to want it in the ast functions, so we convert union
ocfs2_dlm_lksb to struct ocfs2_dlm_lksb and let it carry the connection.

Signed-off-by: Joel Becker <joel.becker@oracle.com>

diff --cc fs/ocfs2/dlmglue.c
Simple merge

diff --cc fs/ocfs2/ocfs2.h
Simple merge

diff --cc fs/ocfs2/stack_o2cb.c
Simple merge

diff --cc fs/ocfs2/stack_user.c
Simple merge

diff --cc fs/ocfs2/stackglue.c
Simple merge

diff --cc fs/ocfs2/stackglue.h
Simple merge