GH #337 - zato.service.* api-tests

The step:
    And JSON Pointer "{path}" is a list
expect csv values instead of list,tuple or set to check

In zato.service.slow-response.get the response fields 
/zato_service_slow_response_get_response/req
/zato_service_slow_response_get_response/resp
are not base64 encoded as documentation points

There is an error in the create_cluster.py at zato-cli that doesn't allow to properly execute the service zato.service.get-channel-list. The line was:
'zato.service.get-channel-list':'zato.server.service.interna.sol.service.GetChannelList
a fix has been submited in this pull request