Rename test_ares_timeout to test__ares_timeout per conventien.

src/gevent/tests/test__api_timeout.py

@@ -106,6 +106,7 @@ class Test(greentest.TestCase):
 
 
     @greentest.skipOnAppVeyor("Timing is flaky, especially under Py 3.4/64-bit")
+    @greentest.skipOnPyPy3OnCI("Timing is flaky, especially under Py 3.4/64-bit")
     def test_api(self):
         # Nothing happens if with-block finishes before the timeout expires
         t = Timeout(DELAY * 2)

src/gevent/tests/tests_that_dont_do_leakchecks.txt

@@ -2,4 +2,4 @@ test___monkey_patching.py
 test__monkey_ssl_warning.py
 test___monitor.py
 test__monkey_scope.py
-test_ares_timeout.py
+test__ares_timeout.py

src/gevent/tests/tests_that_dont_monkeypatch.txt

@@ -20,3 +20,4 @@ test___monitor.py
 test__events.py
 test__monkey_scope.py
 test__iwait.py
+test__ares_timeout.py

src/gevent/tests/tests_that_dont_use_resolver.txt

@@ -2,7 +2,7 @@ test__all__.py
 #uses socket test__api.py
 test__api_timeout.py
 test__ares_host_result.py
-test_ares_timeout.py  # explicitly uses ares resolver
+test__ares_timeout.py  # explicitly uses ares resolver
 # uses socket test__backdoor.py
 test_close_backend_fd.py
 test__core_async.py