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
Updated the version number for the splunk source.
Remove 'columns' option in second jdbchdfs test

This isn't required when supplying the SQL directly.