Added the ability to import and export the configuration map from the command line interface.
Issue: MIRTH-3345
MIRTH-2179: Fixed UI bug where validation would fail if other HTTP Sender destinations are using the application/x-www-form-urlencoded content type.
MIRTH-3452: Fixed bug where form encoded parameters were being included in the request line for PUTs.
MIRTH-2179: Similar to how the content field is required when sending regular entity-enclosing requests, the query parameters are now required in validation if application/x-www-form-urlencoded is used.