Get API deployment for a given restApiId and deploymentId.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_apigateway.describe_api_deployent restApiId deploymentId

def describe_api_deployment(restApiId, deploymentId, region=None, key=None, keyid=None, profile=None):
    '''
    Get API deployment for a given restApiId and deploymentId.

    CLI Example:

    .. code-block:: bash

        salt myminion boto_apigateway.describe_api_deployent restApiId deploymentId

    '''
    try:
        conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
        deployment = conn.get_deployment(restApiId=restApiId, deploymentId=deploymentId)
        return {'deployment': _convert_datetime_str(deployment)}
    except ClientError as e:
        return {'error': __utils__['boto3.get_error'](e)}