* server: Add back controller shutdown on worker startup failure
This adds back the controller shutdown call on worker failure.
This was added in a15961e4 to address a panic discovered in testing, and
was mistakenly thought to be unnecessary. This, however, covers
multi-role scenarios where we have already started the controller, which
needs to be shut down gracefully if possible if we can't start the
worker.
A nil check has been added to ensure the panic does not resurface.
Co-authored-by: Jeff Mitchell <jeffrey.mitchell@gmail.com>
Chris MarchesiandJeff Mitchell
947dc96b30