Sleep two milliseconds FBO winbot.

See #60, #65.

src/ZODB/tests/HistoryStorage.py

@@ -34,7 +34,7 @@ class HistoryStorage:
         for data in data:
             if sys.platform == 'win32':
                 # time.time() has a precision of 1ms on Windows.
-                sleep(0.001)
+                sleep(0.002)
             revids.append(self._dostore(oid, revids[-1], MinPO(data)))
         revids.reverse()
         del revids[-1]
@@ -46,7 +46,7 @@ class HistoryStorage:
         if sys.platform == 'win32':
             # Same as above. This is also required in case this method is
             # called several times for the same storage.
-            sleep(0.001)
+            sleep(0.002)
         a = time()
         for d in h:
             b = a