tests - print logs when setup_test fails

examples/proxy-protocol/variables.env

@@ -1,4 +1,4 @@
-*DNS_RESOLVERS=8.8.8.8 8.8.4.4
+DNS_RESOLVERS=8.8.8.8 8.8.4.4
 # replace with your domains
 SERVER_NAME=www.example.com
 # real IP settings

tests/LinuxTest.py

@@ -114,6 +114,7 @@ class LinuxTest(Test) :
                 raise(Exception("docker exec systemctl restart failed (linux stack)"))
         except :
             log("LINUX", "❌", "exception while running LinuxTest._setup_test()\n" + format_exc())
+            self._debug_fail()
             self._cleanup_test()
             return False
         return True