task/ta-npp-033-04 -- complete separation from config file

nparcel/conf/npftp.conf
* removed redundant items specific to test cases.  These
  scenarios now managed in test file

nparcel/ftp.py
* archive_dir attribute defaults to '/data/nparcel/archive/ftp'
* updated the _parse_config() method to support non file-based
  config items