SSM Run Command - Task will pass when command execution fails

When running SSM Run Command (AWS-RunShellScript) the task will run and reports success even when the command execution fails.

Expected behavior:
Run Command
wait for command exit code
report task status
..next task

Start by locating the SSM Run Command task and its status handling for AWS-RunShellScript. Reproduce a failing command and trace whether the task waits for the command exit code before continuing; done means a nonzero exit is reported as failure and the next task does not run.

Written by the indexing model from the issue text.