This reverts commit 60508cb03d, reversing
changes made to 8579d07f14.
The patches for bug 7688 caused a failure in t/db_dependent/Serials.t:
not ok 8 - test getting history from sub-scription
Conflicts:
installer/data/mysql/kohastructure.sql
installer/data/mysql/updatedatabase.pl
kohaversion.pl