XD-1191 Modifying JDBC sink configuration

- changing default for 'initializeDatabase' to false
  (this was the original value - used to be overridden in jdbc.properties)

- moving some default values back to xml file from options properties file
  so we can override them in the jdbc.properties file

- leaving initializeDatabase commented out in jdbc.properties since we are
  now using the existing batch database by default instead of a temporary
  in-memory db

- modifying test script to reflect change of default value