doc: switch examples to Zake

This avoids having Zookeeper or memcached running, which might not be
the case.

Change-Id: Ib66eb8348aece447ee2c8de084c4ac807b552907

examples/coordinator.py

@@ -1,5 +1,5 @@
 from tooz import coordination
 
-coordinator = coordination.get_coordinator('kazoo://localhost', b'host-1')
+coordinator = coordination.get_coordinator('zake://', b'host-1')
 coordinator.start()
 coordinator.stop()

examples/coordinator_heartbeat.py

@@ -4,7 +4,7 @@ from tooz import coordination
 
 ALIVE_TIME = 5
 
-coordinator = coordination.get_coordinator('memcached://localhost', b'host-1')
+coordinator = coordination.get_coordinator('zake://', b'host-1')
 coordinator.start()
 
 start = time.time()

examples/group_membership.py

@@ -4,7 +4,7 @@ import six
 
 from tooz import coordination
 
-coordinator = coordination.get_coordinator('kazoo://localhost', b'host-1')
+coordinator = coordination.get_coordinator('zake://', b'host-1')
 coordinator.start()
 
 # Create a group

examples/group_membership_watch.py

@@ -4,7 +4,7 @@ import six
 
 from tooz import coordination
 
-coordinator = coordination.get_coordinator('kazoo://localhost', b'host-1')
+coordinator = coordination.get_coordinator('zake://', b'host-1')
 coordinator.start()
 
 # Create a group

examples/leader_election.py

@@ -6,7 +6,7 @@ import six
 from tooz import coordination
 
 ALIVE_TIME = 1
-coordinator = coordination.get_coordinator('kazoo://localhost', b'host-1')
+coordinator = coordination.get_coordinator('zake://', b'host-1')
 coordinator.start()
 
 # Create a group

examples/lock.py

@@ -1,6 +1,6 @@
 from tooz import coordination
 
-coordinator = coordination.get_coordinator('kazoo://localhost', b'host-1')
+coordinator = coordination.get_coordinator('zake://', b'host-1')
 coordinator.start()
 
 # Create a lock