Assessor mode - positional arguments (operations) not matching help guide

[efisher008]

When looking at the help printout for the assessor.py script (python asessor.py --help), the following appears:

positional arguments:
  operation             Operation to perform - choose from dict_keys(['progress', 'blacklist', 'upgrade', 'summarise', 'display', 'cleanup', 'match', 'status_log']).
  groupID               Group identifier code

In the Assessor Tool overview in the documentation (https://cedadev.github.io/padocc/assess-overview.html), it says:

So this text is missing descriptions of the options "blacklist" and "status-log" which can be performed in the package.

[dwest77a]

Move this over to padocc_cli when relevant.