[ENH] Use central logic to identify the database to use

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@47748 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] Use central logic to identify the database to use

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@47749 b456876b-0849-0410-b77d-98878d47e9d5