CDRIVER-3727 unskip /TOPOLOGY/happy_eyeballs* tests (#1413)

* format `test-happy-eyeballs.c`

* remove unreferenced `test_happy_eyeballs_retirement`

* set `MONGOC_TEST_IPV4_AND_IPV6_HOST` in mock server tests

Needed to run the `/TOPOLOGY/happy_eyeballs` tests

Author: kevinAlbs

.evergreen/scripts/run-mock-server-tests.sh

@@ -32,6 +32,7 @@ export MONGOC_TEST_SERVER_LOG="json"
 export MONGOC_TEST_SKIP_MOCK="off"
 export MONGOC_TEST_SKIP_LIVE="on"
 export MONGOC_TEST_SKIP_SLOW="on"
+export MONGOC_TEST_IPV4_AND_IPV6_HOST="ipv4_and_ipv6.test.build.10gen.cc"
 
 # shellcheck source=.evergreen/scripts/add-build-dirs-to-paths.sh
 . "${script_dir}/add-build-dirs-to-paths.sh"

src/libmongoc/tests/test-happy-eyeballs.c

@@ -360,22 +360,22 @@ _testcase_run (he_testcase_t *testcase)
 
 #define CLIENT(client) \
    {                   \
-#client          \
+      #client          \
    }
 
 #define CLIENT_WITH_DNS_CACHE_TIMEOUT(type, timeout) \
    {                                                 \
-#type, timeout                                 \
+      #type, timeout                                 \
    }
 #define HANGUP true
 #define LISTEN false
 #define SERVER(type, hangup) \
    {                         \
-#type, hangup          \
+      #type, hangup          \
    }
 #define DELAYED_SERVER(type, hangup, delay) \
    {                                        \
-#type, hangup, delay                  \
+      #type, hangup, delay                  \
    }
 #define SERVERS(...) \
    {                 \
@@ -385,7 +385,7 @@ _testcase_run (he_testcase_t *testcase)
 #define DURATION_MS(min, max) (min), (max)
 #define EXPECT(type, num_acmds, duration) \
    {                                      \
-#type, num_acmds, duration          \
+      #type, num_acmds, duration          \
    }
 #define NCMDS(n) (n)
 
@@ -436,12 +436,6 @@ test_happy_eyeballs_dns_cache (void)
 #undef E
 }
 
-void
-test_happy_eyeballs_retirement (void)
-{
-   /* test connecting to a retired node that fails to initiate a connection. */
-}
-
 void
 test_happy_eyeballs_install (TestSuite *suite)
 {