Return a dictionary representation of this phase.
        This will be used for checksumming, in order to uniquely compare
        instance images against their requirements

def get_dict_repr(self):
        """
        Return a dictionary representation of this phase.
        This will be used for checksumming, in order to uniquely compare
        instance images against their requirements
        """
        return dict(
            phase_name = self.phase_name,
            phase_type = self.phase_type,
            actions = self.actions
            )