Description of problem:
Shinken not compatible with python-pyro4 > 4.20


Version-Release number of selected component (if applicable):
python-pyro4-4.23


How reproducible:
start shinken-arbiter


Steps to Reproduce:
1.start shinken-arbiter
2.get the following error
2014-05-02 15:45:29,023 [1399038329] Error :   Failed sending configuration for scheduler-1: unsupported serialized class: Module



ProtocolError: unsupported serialized class: Module
 +--- This exception occured remotely (Pyro) - Remote traceback:
 | Traceback (most recent call last):
 |   File "/usr/lib/python2.7/site-packages/Pyro4/core.py", line 712, in handleRequest
 |     objId, method, vargs, kwargs = serializer.deserializeCall(msg.data, compressed=msg.flags & Pyro4.message.FLAGS_COMPRESSED)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 167, in deserializeCall
 |     return self.loadsCall(data)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 399, in loadsCall
 |     vargs = self.recreate_classes(vargs)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 312, in recreate_classes
 |     return tuple(self.recreate_classes(x) for x in literal)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 312, in <genexpr>
 |     return tuple(self.recreate_classes(x) for x in literal)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 318, in recreate_classes
 |     result[key] = self.recreate_classes(value)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 310, in recreate_classes
 |     return [self.recreate_classes(x) for x in literal]
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 315, in recreate_classes
 |     return self.dict_to_class(literal)
 |   File "/usr/lib/python2.7/site-packages/Pyro4/util.py", line 294, in dict_to_class
 |     raise Pyro4.errors.ProtocolError("unsupported serialized class: "+classname)
 | ProtocolError: unsupported serialized class: Module
 +--- End of remote traceback


Reproducible: 

Steps to Reproduce: