Modules usage update: permissions config

[NShaforostov]

This PR adds new features to the modules usage functionality:

• common permissions settings may be specified in the separate config JSON file. Via this config, could be specified:
  • list of support contacts
  • list of possible regions
• if such config exists:
  • in case when module is denied for the current user by set permissions, list of support contacts from config will be shown when attempting to load the module
  • possible regions from config are used for selection location permission restrictions for modules
• if config doesn't exist:
  • general message about module permissions retriction is printed (without support contacts)
  • possible regions are loaded from the stub
• path to the permissions config is set via the environment variable CP_CAP_MODULES_PERMISSIONS_CONFIG_PATH
• format of the config file:

{
    "support": [
        "supportname1",
        "supportname2",
        ...
    ],
    "locations": [
        "Country1",
        "Country2",
        ...
    ]
}