We introduced some threads, because it's not safe to make kazoo calls

in a session watch callback. So added sleeps to some of the tests
having to do with session recovery.

src/zc/zk/disconnectiontests.py

@@ -162,6 +162,8 @@ def session_timeout_with_child_and_data_watchers():
     properties changed True
     children changed True
 
+    >>> import time; time.sleep(1)
+
     Our handlers were called because data changed.
 
     >>> dict(properties)

src/zc/zk/ephemeral_node_recovery_on_session_reestablishment.test

@@ -41,6 +41,11 @@ Some custom data and acl:
         a = 1
         pid = 9999
     >>> zk.client.lose_session()
+
+There be threading thar, so wait:
+
+    >>> import time; time.sleep(1)
+
     >>> zk.print_tree('/fooservice/providers')
     /providers
       /test