disable system tests on PyPy

src/allmydata/test/test_system.py

@@ -422,6 +422,9 @@ def _render_section_values(values):
 class SystemTestMixin(pollmixin.PollMixin, testutil.StallMixin):
 
     def setUp(self):
+        if 'pypy' in sys.version.lower():
+            self.skip = "pypy can't run these, due to SSL errors (ee key too tiny)"
+
         self.port_assigner = SameProcessStreamEndpointAssigner()
         self.port_assigner.setUp()
         self.addCleanup(self.port_assigner.tearDown)