Access to Memory (AtoM)

PR for code review: https://github.com/artefactual/atom/pull/440

looks good, I just had one suggestion (which is really just a personal preference, feel free to ignore)

Hi Mike, can you post some testing instructions? You could just run the help command for the task and paste the output here.

Some tests that could be done:

1) ./symfony tools:delete-user <non-administrator username that doesn't exist> (should be asked to confirm, then get an error)

2) ./symfony tools:delete-user <non-administrator username that exists> (after entering "y" to confirm should get deleted)

3) ./symfony tools:delete-user <non-administrator username that exists> --force (there should be no confirmation request and should get deleted)

4) ./symfony tools:delete-user <sole administrator username that exists> (it should error after asking confirmation, not letting the last administrator be deleted)

5) ./symfony tools:delete-user <one of more than one administrator usernames that exist> (it should ask confirmation then delete)

6) ./symfony tools:delete-user <username that exists and has associated notes> (it should error complaining that note association's would be lost)

7) ./symfony tools:delete-user <username that exists and has associated notes> --update-notes (it should delete the user despite the note associations)

Usage:
 symfony tools:delete-user [--application[="..."]] [--env="..."] [--connection="..."] [-f|--force] [-n|--update-notes] username

Arguments:
 username        The username to delete.

Options:
 --application   The application name (default: 1)
 --env           The environment (default: cli)
 --connection    The connection name (default: propel)
 --force         (-f) Delete without confirmation
 --update-notes  (-n) Dissassociate any notes the user has created

Hi Sara, can you go through Mike's test examples for QA?

As per this: https://projects.artefactual.com/issues/4812#note-6, notes are disassociated from the user that created them if the user is going to be deleted. After running this:

./symfony tools:delete-user <username that exists and has associated notes>

the user is deleted, but the note remains. No warning is given that the user has a note because the note is disassociated when the deletion process kicks off. I think this is acceptable behaviour, so marking this verified.

Note: there's a recommendation to amend the note-disassociating behaviour in the aforementioned ticket.

Documentation added to 2.4 branch in: https://github.com/artefactual/atom-docs/commit/8687201bad95892f267d63380ae262a56e8c1f46