TESTS: replace old test suite with the new one

get rid of Bats definitively

test/test_default-host.yml

@@ -0,0 +1,17 @@
+# GIVEN a webserver with VIRTUAL_HOST set to web1.tld
+web1:
+  image: web
+  expose:
+    - "81"
+  environment:
+    WEB_PORTS: 81
+    VIRTUAL_HOST: web1.tld
+
+
+# WHEN nginx-proxy runs with DEFAULT_HOST set to web1.tld
+sut:
+  image: jwilder/nginx-proxy:test
+  volumes:
+    - /var/run/docker.sock:/tmp/docker.sock:ro
+  environment:
+    DEFAULT_HOST: web1.tld