Checking module permissions before the module launch

[NShaforostov]

This PR adds functionality that checks whether module is permitted to launch for the user.

The approach is the following:

• within the run launched with enabled Module capability, via modules_setup inner script, a configuration file (SitePackage.lua) and auxiliary shell script (CheckPermissions.sh) are being created in the CP_CAP_MODULES_CONFIG_DIR
• this configuration file contains a hook that is used every time when user loads a module
• this hook checks:
  • if there is a file permissions.json in the module directory then:
    • if permissions mode in the file is restriction by usernames - then checks whether current user is in the permitted list (in permissions.json)
    • if permissions mode in the file is restriction by locations - then checks whether location of the current user is in the permitted list (in permissions.json)
    • if validation are passed then module is being loaded as usual else launch is being blocked and an error message appears
  • else if no permissions.json in the module directory then module is launched without any additional validations

Additional details:

• validations are being performed via CheckPermissions.sh shell script that is being launched from module configuration file (SitePackage.lua) and located in the same directory (CP_CAP_MODULES_CONFIG_DIR)
• name of the current user is obtained from the JWT token ($API_TOKEN)
• location of the current user is obtained from the user attribute (user_region)