TESTS: replace old test suite with the new one

get rid of Bats definitively

test/test_custom/test_proxy-wide.py

@@ -0,0 +1,20 @@
+import pytest
+
+def test_custom_conf_does_not_apply_to_unknown_vhost(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://nginx-proxy/")
+    assert r.status_code == 503
+    assert "X-test" not in r.headers
+
+def test_custom_conf_applies_to_web1(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://web1.nginx-proxy.local/port")
+    assert r.status_code == 200   
+    assert r.text == "answer from port 81\n"
+    assert "X-test" in r.headers
+    assert "f00" == r.headers["X-test"]
+
+def test_custom_conf_applies_to_web2(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://web2.nginx-proxy.local/port")
+    assert r.status_code == 200   
+    assert r.text == "answer from port 82\n"
+    assert "X-test" in r.headers
+    assert "f00" == r.headers["X-test"]