LU-14927 quota: move qsd_transfer to lquota module

LU-14927 quota: move qsd_transfer to lquota module

With osd-zfs inheriting the tainted state of ZFS we can no longer
directly use kernel internals that exported GPL only. The osd-zfs
modules quota code uses some of these internal functions. The
osd-zfs qsd_transfer() function is generic enough that we can
move it to the lquota modules.

Change-Id: I735db0266306477cd5558968f1f3ed1f6e1b32da
Signed-off-by: James Simmons <jsimmons@infradead.org>
Reviewed-on: https://review.whamcloud.com/44735
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>