message: add testing-broker-connectivity instructions to readme
diff: @@ -8,6 +8,7 @@ import * as acm from '@aws-cdk/aws-certificatemanager';
  import * as r53 from '@aws-cdk/aws-route53';
  import * as r53Targets from '@aws-cdk/aws-route53-targets';
  import * as cr from '@aws-cdk/custom-resources';
  +import * as ssm from '@aws-cdk/aws-ssm';
  //Paste Hosted zone ID from Route53 console 'Hosted zone details'
  @@ -73,24 +74,18 @@ export class TheBasicMQStack extends cdk.Stack {
  value: bastionToMQGroup.securityGroupId
  });
  -
  const mqUsername = 'admin';
  - const mqCredentialsSecret = new secrets.Secret(this, 'mqSecret', {
  - secretName: 'mqSecret',
  - generateSecretString: {
  - secretStringTemplate: JSON.stringify({
  - username: mqUsername,
  - }),
  - excludePunctuation: true,
  - includeSpace: false,
  - generateStringKey: 'password'
  - }
  + const mqPassword = 'password1234';
  +
  + new ssm.StringParameter(this, 'stringParameter', {
  + parameterName: 'MQBrokerUserPassword',
  + stringValue: `${mqUsername},${mqPassword}`,
  });
  const mqMasterUser: mq.CfnBroker.UserProperty = {
  'consoleAccess': true,
  - 'username': mqCredentialsSecret.secretValueFromJson('username').toString(),
  - 'password': mqCredentialsSecret.secretValueFromJson('password').toString(),
  + 'username': mqUsername,
  + 'password': mqPassword,
  }
  const mqInstance = new mq.CfnBroker(this, 'mqInstance', {
  