The list of modules and roles is needed in several scripts now,
therefore it makes sense to have one place for this.
Here are the current variables:
BASE_DIR: Base directory of the repo
ROLES: List of roles in the roles folder
MANAGEMENT_MODULES: List of management modules in the plugins/modules
folder
ROLES_MODULES: List of modules in the roles/*/library folders
ALL_MODULES: List of all modules, the management and the roles
modules
All lists are sorted.
