Increase hypothesis deadline

The value is pretty close to the new default that will come out in
future hypothesis versions, which is generating a deprecation error
on CI.

Using a loose deadline because CI boxes are not reliable in how much
CPU power they have available

testing/python/metafunc.py

@@ -188,6 +188,7 @@ class TestMetafunc(object):
         assert metafunc._calls[3].id == "x1-b"
 
     @hypothesis.given(strategies.text() | strategies.binary())
+    @hypothesis.settings(deadline=400.0)  # very close to std deadline and CI boxes are not reliable in CPU power
     def test_idval_hypothesis(self, value):
         from _pytest.python import _idval
         escaped = _idval(value, 'a', 6, None)