gwcli can hang due to hang of rbd-target-api

[michael-db]

I've seen rbd-target-api go into an uninterruptible sleep (a state very difficult to debug).
Starting gwcli in this circumstance leads it to completely hang on doing

        api = APIRequest(endpoint + "/config")
        api.get()

The hang in gwcli at least is avoidable. My quick fix for that was to add these lines to gwcli/utils.py APIRequest.init():

        if 'verify' not in self.kwargs:
            self.kwargs['verify'] = settings.config.api_ssl_verify
        ##### added this: #####
        if 'timeout' not in self.kwargs:
            self.kwargs['timeout'] = 20

(Though the error handling would also best be improved so that a timeout leads to an appropriate message rather than an "unknown error".)