Reads connections from configuration parameters.
        Each section represents an individual Connectionparams

        :param connections: configuration parameters to be read

def read_connections(self, connections):
        """
        Reads connections from configuration parameters.
        Each section represents an individual Connectionparams

        :param connections: configuration parameters to be read
        """
        del self._items[:]
        for key in connections.get_key_names():
            item = DiscoveryItem()
            item.key = key
            value = connections.get_as_nullable_string(key)
            item.connection = ConnectionParams.from_string(value)
            self._items.append(item)