added 2 helper functions to test if a module is enabled and if it's installled for a given PHP version
added 2 helper functions to test if a module is enabled and if it's installled for a given PHP version

Varying-Vagrant-Vagrants/VVV,saucal/VVV,saucal/VVV,trepmal/varying-vagrant-vagrants,Varying-Vagrant-Vagrants/VVV,trepmal/varying-vagrant-vagrants,Varying-Vagrant-Vagrants/VVV,saucal/VVV