fix(exceptions): Register exception for server-side QUOTAEXCEEDED(-125)

Without this, the out-of-quota conditions cause Kazoo's request
handling thread to die, and the application is left waiting for a
non-existent reply and/or does not receive any clue that its Kazoo
client handle is not functional anymore.

Author: ztzg

kazoo/exceptions.py

@@ -187,6 +187,11 @@ class NotReadOnlyCallError(ZookeeperError):
     a read-only server"""
 
 
+@_zookeeper_exception(-125)
+class QuotaExceededError(ZookeeperError):
+    """Exceeded the quota that was set on the path"""
+
+
 class ConnectionClosedError(SessionExpiredError):
     """Connection is closed"""