CE-123 Jobs for identifying and closing spam accounts

This PR creates two maintenances scripts and refactors the EditAccount/SpecialEditAccount_body.php a bit.

#### maintenance/wikia/identifySpamAccounts.php
This script queries the database to identify all e-mails associated with a large amount of user accounts. This value is currently hardcoded at > 700. The script then uses the emails to find all user accounts associated with that list, and writes all of this out to a txt file.

#### maintenance/wikia/disableAccount.php
A simple job that takes one CLI argument, a `user_id` and calls EditAccount::closeAccount on that user, permanently disabling this account. This script is suitable for singular account closures or multiple by piping `cat` output into it.

@lgarczewski @mroszka