'Update URL parameters with values from self.gke_params.
@inherits: :class:`GoogleBaseConnection.pre_connect_hook`'

def pre_connect_hook(self, params, headers):

    (params, headers) = super(GKEConnection, self).pre_connect_hook(params, headers)
    if self.gke_params:
        params.update(self.gke_params)
    return (params, headers)
