TESTS: replace old test suite with the new one

get rid of Bats definitively

test/test_dockergen/test_dockergen_v3.yml

@@ -0,0 +1,24 @@
+version: '3'
+services:
+  nginx:
+    image: nginx
+    container_name: nginx
+    volumes:
+      - nginx_conf:/etc/nginx/conf.d
+
+  dockergen:
+    image: jwilder/docker-gen
+    command: -notify-sighup nginx -watch /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+      - ./nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl
+      - nginx_conf:/etc/nginx/conf.d
+
+  whoami:
+    image: jwilder/whoami
+    container_name: whoami
+    environment:
+      - VIRTUAL_HOST=whoami.nginx.container.docker
+
+volumes:
+  nginx_conf: {}