tests(urllib3): use an actual broken url (#2995)

The previous test attempted to use a subdomain to mimic a broken
resolution but this actually is not broken for later versions of linux +
docker.

Author: Kyle-Verhoog

tests/contrib/urllib3/test_urllib3.py

@@ -185,7 +185,7 @@ def test_connection_retries(self):
         """Tests a connection error results in error spans with proper exc info"""
         retries = 3
         try:
-            self.http.request("GET", "http://fakesubdomain." + SOCKET, retries=retries)
+            self.http.request("GET", "http://localhost:9999", retries=retries)
         except Exception:
             pass
         else: