Update a property, indexing the property by codebase if codebase is not
        ''.  Source steps should generally use this instead of setProperty.

def updateSourceProperty(self, name, value, source=''):
        """
        Update a property, indexing the property by codebase if codebase is not
        ''.  Source steps should generally use this instead of setProperty.
        """
        # pick a decent source name
        if source == '':
            source = self.__class__.__name__

        if self.codebase != '':
            assert not isinstance(self.getProperty(name, None), str), \
                "Sourcestep %s has a codebase, other sourcesteps don't" \
                % self.name
            property_dict = self.getProperty(name, {})
            property_dict[self.codebase] = value
            super().setProperty(name, property_dict, source)
        else:
            assert not isinstance(self.getProperty(name, None), dict), \
                "Sourcestep %s does not have a codebase, other sourcesteps do" \
                % self.name
            super().setProperty(name, value, source)