ocfs2: Remove struct ocfs2_journal_handle in favor of handle_t

This is mostly a search and replace as ocfs2_journal_handle is now no more
than a container for a handle_t pointer.

ocfs2_commit_trans() becomes very straight forward, and we remove some out
of date comments / code.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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