Bugfix: sleep method was renamed to watch

patroni.py

@@ -76,7 +76,7 @@ class Patroni:
         if nap_time <= 0:
             self.next_run = current_time
         else:
-            self.ha.dcs.sleep(nap_time)
+            self.ha.dcs.watch(nap_time)
 
     def run(self):
         self.api.start()

tests/test_patroni.py

@@ -104,7 +104,7 @@ class TestPatroni(unittest.TestCase):
         self.p.touch_member = self.touch_member
         self.p.ha.state_handler.sync_replication_slots = time_sleep
         self.p.ha.dcs.client.read = etcd_read
-        self.p.ha.dcs.sleep = time_sleep
+        self.p.ha.dcs.watch = time_sleep
         self.assertRaises(SleepException, self.p.run)
         self.p.ha.state_handler.is_leader = lambda: False
         self.p.api.start = nop