WorkerInstanceFleet fails deployment for Windows instances

[jusiskin]

The WorkerInstanceFleet construct fails to deploy its ASG instances when configured to deploy Windows AMIs with Deadline 10.1.14.x.

Reproduction Steps

all Windows Worker fleet integration tests currently fail using the defaults (latest Deadline version of 10.1.14.5).

Error Log

The cdk deploy output shows:

4:50:57 AM | CREATE_FAILED        | AWS::AutoScaling::AutoScalingGroup          | WorkerStructWF2/Worker3/Default/ASG
Received 0 SUCCESS signal(s) out of 1.  Unable to satisfy 100% MinSuccessfulInstancesPercent requirement

When looking at the userdata CloudWatch logs, the following is seen:

2021/03/20 06:28:28Z: <powershell> tag was provided.. running powershell content
2021/03/20 06:30:31Z: Userdata:  is currently executing. To end it kill the process with id: 3880
2021/03/20 06:32:32Z: Userdata:  is currently executing. To end it kill the process with id: 3880
2021/03/20 06:34:34Z: Userdata:  is currently executing. To end it kill the process with id: 3880
...

Environment

• CDK CLI Version : 1.91.0
• CDK Framework Version: 1.91.0
• RFDK Version: 0.27.0
• Deadline Version: 10.1.14.5
• Node.js Version: Any
• OS : Amazon Linux 2
• Language (Version): All

Other

This was not occurring in the integration tests for the 0.27.0 release. At that time, the latest Deadline version available to RFDK was 10.1.13.2.

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