Unable to process unexpected CM_SLAC_PARM message

[tropxy]

According to the spec, at any point in time, if a CM_SLAC_PARM.REQ is received, the application must interpret it as a reset of the Slac process and process the Slac parameter message (this means a reset of the state machine).

The issue is that with the current code, the application is unable to jump to a state where processes the slac parm request and continues with the rest of the flow. This is a design flaw and requires refactoring.

A state design pattern may be the best fit for the job:

• https://auth0.com/blog/state-pattern-in-python/
• https://refactoring.guru/design-patterns/state/python/example