Should consider adding a namespace to launcher options

[kevin-bates]

We may want to consider adding a namespace indicator to launcher options sooner rather than later. Right now we only have --response-address, but we might want others. For each option, there's the chance that it collides with a pre-existing parameter. This can be avoided by prefixing all parameters with a namespace which is considered good practice anyway.

Some proposals include:
Elyra e.g., --Elyra.response-address
ElyraLauncher e.g., --ElyraLauncher.response-address
KernelLauncher e.g., --KernelLauncher.response-address

This would require changes to each of the launchers such that the appropriate parameter is processed.

[kevin-bates]

Per discussion, we're going with a namespace of RemoteProcessProxy since jupyter convention is that parameter namespaces reflect the class to which they apply. This issue to Sprint 6.