Must instantiate connection with active JDBC connection

[wasabii]

Currently IKVM's class loader hierarchy prevents the proper working of SPI-provided things. This needs to be resolved in IKVM.

Basically, the java.sql.DriverManager instance is unable to locate SPI provided drivers, since the classloader of the calling class is used to validate access. However, IKVM.Jdbc.Data's AssemblyClassLoader, which does not have a static reference to the driver, since it is dynamic. And thus it's unable to find the class.

IKVM's class loader stuff needs to make more sense.