We should not use `ActiveRecord::Base.connected?` to
check if a DB exists because that only checks if a
connection is already established. It's possible
for the DB to exist but a connection has not yet
been established.

I noticed that this method in the initializer was
wrong but we didn't notice it because this method
was never invoked.

0_license.rb is run before any connections are
established so `connected?` always returned false
even if the table exists.

I've also fixed other places that use the same check
even though they might not be having problems because
a connection is already established at that point.