Refactor start and stop functionality of the simulator

[georgi-l95]

Problem

Currently stop method does nothing else, apart from setting a variable to false.
Start method Only initiates a while loop and start streaming already loaded data.

Solution

• Stop method should stop the streaming or consuming
• Start method should start streaming or consuming (depending on configuration)
  • Extract current streaming logic in outside method
  • Extract future consumer logic in outside method
• Start method should actually, depending on configuration, setup the channel, otherwise it produces errors.

Alternatives

No response