cls local should support building and running a workload docker image

[cwensel]

cls local will create a shell script for running a declared workload as it would if deployed.

cls local --docker should locally build the image and generate a script that runs the image as it would if deployed.

[cwensel]

docker run -it --rm \
  -e AWS_REGION=$AWS_REGION \
  -e AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID \
  -e AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY \
  -e AWS_BATCH_JOB_ID=$AWS_BATCH_JOB_ID \
  -e AWS_BATCH_JOB_ATTEMPT=$AWS_BATCH_JOB_ATTEMPT \
  -e CLS_ARC_PROPS_JSON=$CLS_ARC_PROPS_JSON \
  -e CLS_ARC_PROPS_JAVA=$CLS_ARC_PROPS_JAVA \
  <image tag> \
  <declared command>

[cwensel]

added to a60b37b