Add module validation to drush module enabling

Problem/Motivation

Module validation is currently only performed when enabling a module from the Drupal admin interface. It should however also throw an error if a disallowed module is enabled from the terminal using Drush.

Proposed resolution

Create a Drush hook which hooks into the PmCommands::INSTALL command and validates that no disallowed modules will be installed.

Remaining tasks

- Create Drush hook

User interface changes

None

API changes

None

Data model changes

New Drush hook