Update docker/cli, add src override for docker/docker

[allisaurus]

• Resolves "Invalid interpolation format" when specifying mandatory variables in docker-compose files #651
• Updates docker/cli to newer version that incorporates support for mandatory variables
• Adds src override for docker/docker that targets moby/moby

Testing

Success (var exists)

docker-compose.yml:

version: '3'
services:
  wordpress:
    image: httpd
    ports:
      - "80:80"
    environment:
     - "OS: ${OS}"
     - "username: ${USERNAME:?err}"  # existing env var

output (success) :

$~> ..\..\Documents\GO\src\github.com\aws\amazon-ecs-cli\bin\local\ecs-cli.exe compose up
INFO[0000] Using ECS task definition                     TaskDefinition="651:4"
INFO[0000] Found existing ECS tasks for project          CountOfTasks=1 ProjectName=651
INFO[0000] Updating to new task definition               taskDefinition="arn:aws:ecs:us-west-2:##########:task-definition/651:4"
INFO[0000] Describe ECS container status                 container=45f966e6-1de4-41ae-9443-c62fea0ff108/wordpress desiredStatus=STOPPED lastStatus=RUNNING taskDefinition="651:3"
INFO[0000] Describe ECS container status                 container=0d60d854-0d90-48e7-bff0-31a6b8eff6f0/wordpress desiredStatus=RUNNING lastStatus=PENDING taskDefinition="651:4"
INFO[0006] Stopped container...                          container=45f966e6-1de4-41ae-9443-c62fea0ff108/wordpress desiredStatus=STOPPED lastStatus=STOPPED taskDefinition="651:3"
INFO[0012] Started container...                          container=0d60d854-0d90-48e7-bff0-31a6b8eff6f0/wordpress desiredStatus=RUNNING lastStatus=RUNNING taskDefinition="651:4"

Missing var (error)

docker-compose.yml:

version: '3'
services:
  wordpress:
    image: httpd
    ports:
      - "80:80"
    environment:
     - "OS: ${OS}"
     - "username: ${MISSING:?err}"  # non-existent env var

output (error):

$~> ..\..\Documents\GO\src\github.com\aws\amazon-ecs-cli\bin\local\ecs-cli.exe compose up
ERRO[0000] Unable to open ECS Compose Project            error="invalid interpolation format for services.wordpress.environment.[]: \"required variable MISSING is missing a value: err\". You may need to escape any $ with another $."
FATA[0000] Unable to create and read ECS Compose Project  error="invalid interpolation format for services.wordpress.environment.[]: \"required variable MISSING is missing a value: err\". You may need to escape any $ with another $."

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[SoManyHs]

yes grood seems load-bearing

[allisaurus]

X(

[SoManyHs]

Is there a reason why we can't track something less binding than a revision? (e.g. version)