Creates a key and saves it to a given path.
    Returns the private key.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_ec2.create_key mykey /root/

def create_key(key_name, save_path, region=None, key=None, keyid=None,
               profile=None):
    '''
    Creates a key and saves it to a given path.
    Returns the private key.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_ec2.create_key mykey /root/
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)

    try:
        key = conn.create_key_pair(key_name)
        log.debug("the key to return is : %s", key)
        key.save(save_path)
        return key.material
    except boto.exception.BotoServerError as e:
        log.debug(e)
        return False