Changing java package reference conventions for OracleTypes

[kalenp]

I'd like to change the references to OracleTypes here from the Java::oracle.jdbc.OracleTypes::TIMESTAMPTZ convention to Java::OracleJdbc::OracleTypes::TIMESTAMPTZ.

The reason for this is that our application loads the Oracle JDBC driver in a separate classloader, so when oracle.rb is loaded, these constants are not resolvable. With the other JRuby convention for referencing packages, we are able to patch this in with an ad-hoc module that defines the types for Sequel to pick up. It's not pretty, but it works. With the current convention, though, you can't define module oracle, since oracle isn't a valid Ruby constant name.

There are several other places which use this package convention which could also be updated for consistency sake. Overall, Sequel seems to use Java::JavaSQL:: for the standard types, but the other convention for non-Java packages.

Would you be open to a PR to make these changes?

[jeremyevans]

Thank you for raising this as an potentially issue. I'd be open for a PR for these changes. As long as it doesn't break existing tests, it should be acceptable.