LU-8066 llite: make llite/lov and lmv symlinks

LU-8066 llite: make llite/lov and lmv symlinks

old proc code had /proc/sys/fs/lustre/llite/.../lov and lmv
dirs that contained name of the dir in lustre/lov and lustre/lmv
to better be able to find correct obd device there, but
I imagine a better solution would be to just create a symlink with
the same name. The name is then pointless and the target dir would
have uuid file just as if it was the old-style dir.

This is a modified version of

Linux-commit : d8ede3f1d5d94618442a61067c6b98a2afbb0962

Change-Id: I90bc1b75e07f0aaa4c3119671f6d097b0e7353b3
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/32516
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>