jfs: Handle error from dquot_initialize()

dquot_initialize() can now return error. Handle it where possible

Slightly modified by Dave Kleikamp due to needed jfs_rename() error path
fix.

Signed-off-by: Jan Kara <jack@suse.com>
Reviewed-by: Dave Kleikamp <dave.kleikamp@oracle.com>

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

diff --cc fs/jfs/jfs_inode.c
Simple merge

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