Not able to use FIFO SQS queues as target for CloudWatch events construct

[pratyush05]

🐛 Bug Report

What is the problem?

When using FIFO SQS queues as a target in CloudWatch events, the field messageGroupId is required. Even though messageGroupId is mentioned when creating an SQS queue target, this field is not present in the generated CloudFormation template

Reproduction Steps

import cdk = require('@aws-cdk/core');
import events = require('@aws-cdk/aws-events');
import sqs = require('@aws-cdk/aws-sqs');
import targets = require('@aws-cdk/aws-events-targets');

export class SampleCloudWatchStack extends cdk.Stack {
  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    // The code that defines your stack goes here
    const deadQueue: sqs.DeadLetterQueue = {
      maxReceiveCount: 20,
      queue: new sqs.Queue(this, 'MyDeadQueue', {
        contentBasedDeduplication: false,
        fifo: true,
        queueName: 'MyDeadQueue.fifo'
      })
    };

    const queue: sqs.Queue = new sqs.Queue(this, 'MyQueue', {
      contentBasedDeduplication: true,
      deadLetterQueue: deadQueue,
      fifo: true,
      queueName: 'MyQueue.fifo'
    });

    const target0: targets.SqsQueue = new targets.SqsQueue(queue, {
      message: events.RuleTargetInput.fromObject({
        id: events.EventField.eventId
      }),
      messageGroupId: 'my_queue'
    });

    const rule: events.Rule = new events.Rule(this, 'MyRule', {
      description: 'This is just a sample rule',
      enabled: true,
      ruleName: 'MyRule',
      schedule: events.Schedule.expression('cron(30 9 ? * MON-FRI *)'),
      targets: [target0]
    });
  }
}

Verbose Log

SampleCloudWatchStack: deploying...
SampleCloudWatchStack: creating CloudFormation changeset...
 0/3 | 7:16:16 PM | UPDATE_IN_PROGRESS   | AWS::Events::Rule     | MyRule (MyRuleA44AB831) 
 1/3 | 7:16:46 PM | UPDATE_FAILED        | AWS::Events::Rule     | MyRule (MyRuleA44AB831)
Parameter(s) SqsParameters must be specified for target: Target0. (Service: AmazonCloudWatchEvents; Status Code: 400; Error Code: ValidationException)
        new Rule (/Users/gpratyush/Personal/AWS/sample-cloud-watch/node_modules/@aws-cdk/aws-events/lib/rule.ts:101:22)

Environment

• CDK CLI Version: 1.4
• Module Version: 1.4
• OS: OS X
• Language: TypeScript