LU-807 utils: remove old service tags support

LU-807 utils: remove old service tags support

Remove obsolete and unused service tags infrastructure from the
build system and mount utilities.  This reverts the changes from:

    14765d2816bafa2a08879ece0e33bf8c97f84948
    805392ae4c4a4295d0f027234c83a670dfdc2268

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I1f2bd75dfd285fa1cebb5cb8eb4772cf2fc9ad7a
Reviewed-on: http://review.whamcloud.com/1634
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Brian J. Murrell <brian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>