Add Variable for Component Workflow Success of Failure

There is nothing to indicate that a NWC component workflow failed after it's called from another workflow. The calling workflow will continue to run afterwards, even though some or all of the variables passed back are blank. This is better than the O365 workflows that wait forever for a suspended workflow, but not much. A simple boolean success variable would be all it would take to fix it. This is similar to the request that NWC workflow failures send a notification when they fail, but that couldn't be used in a workflow because it would happen after the component completes.