use shutil instead of distutils to find executable
use shutil instead of distutils to find executable

To find if we have to use the dinghy compose file or the normal compose
file we now use shutil to find if dinghy is installed.

Signed-off-by: BlackEagle <6c5c99a37e4dd8841971a4b7c7580d6fcba68554@gmail.com>

dockerwest/compose-pimcore,dockerwest/compose-pimcore,BlackIkeEagle/docker-compose-pimcore