task/ta-npi-016-08 -- manufactured barcode should pre-check job_item
table against connote and item_nbr

nparcel/conf/nparceld.conf
nparcel/config.py
* removed the job_item/connote search flags as these are now redundant
  with new processing logic

nparcel/loader.py
* connote now taken from the fields dictionary for more accuracy
* new method get_jobitem_based_job_id() which checks the "job" table
  for related "job_item" records with provided connote and item_nbr
* new method get_item_number_job_id() which checks the "job" table for
  related "job_item" records with item_nbr

nparcel/table/job.py
* new method jobitem_based_job_search_sql() which generates SQL that
  queries the job table for records that are related to a job_item
  record with provided connote and item_nbr