Initiates an election to add/update/remove a validator to an existing BigchainDB network

    :param args: dict
        args = {
        'public_key': the public key of the proposed peer, (str)
        'power': the proposed validator power for the new peer, (str)
        'node_id': the node_id of the new peer (str)
        'sk': the path to the private key of the node calling the election (str)
        }
    :param bigchain: an instance of BigchainDB
    :return: election_id or `False` in case of failure

def run_election_new_upsert_validator(args, bigchain):
    """Initiates an election to add/update/remove a validator to an existing BigchainDB network

    :param args: dict
        args = {
        'public_key': the public key of the proposed peer, (str)
        'power': the proposed validator power for the new peer, (str)
        'node_id': the node_id of the new peer (str)
        'sk': the path to the private key of the node calling the election (str)
        }
    :param bigchain: an instance of BigchainDB
    :return: election_id or `False` in case of failure
    """

    new_validator = {
        'public_key': {'value': public_key_from_base64(args.public_key),
                       'type': 'ed25519-base16'},
        'power': args.power,
        'node_id': args.node_id
    }

    return create_new_election(args.sk, bigchain, ValidatorElection, new_validator)