Split change_tag sql patch

After pulling master and some extensions and
running the update script these tables are not
created when needed.

DB returned error "1146: Table 'my_wiki.valid_tag'

This is probably a broken edge case

This patch splits the patch into three seperate
patches ensuring all of the tables are created if
they dont already exist

Change-Id: I79c740dc4ec68d3c5aa0572dc77ea3ac8d305db9
Merge "Split change_tag sql patch"