bpo-40275: Move transient_internet from test.support to socket_helper (GH-19711)

diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index dafdb6c..5d496c6 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -2246,7 +2246,7 @@
     def test_timeout_connect_ex(self):
         # Issue #12065: on a timeout, connect_ex() should return the original
         # errno (mimicking the behaviour of non-SSL sockets).
-        with support.transient_internet(REMOTE_HOST):
+        with socket_helper.transient_internet(REMOTE_HOST):
             s = test_wrap_socket(socket.socket(socket.AF_INET),
                                 cert_reqs=ssl.CERT_REQUIRED,
                                 do_handshake_on_connect=False)
@@ -2259,7 +2259,7 @@
 
     @unittest.skipUnless(socket_helper.IPV6_ENABLED, 'Needs IPv6')
     def test_get_server_certificate_ipv6(self):
-        with support.transient_internet('ipv6.google.com'):
+        with socket_helper.transient_internet('ipv6.google.com'):
             _test_get_server_certificate(self, 'ipv6.google.com', 443)
             _test_get_server_certificate_fail(self, 'ipv6.google.com', 443)