Separate `model service status` from `model service refresh`

[themoenen]

Problem
Currently the model service status command also functions as a refresh command, regenerating all grammar.

• Unclear for the user
• Causes multiple second of delay for what should be a quick status
• 99% of the time unnecessary

Solution
Create new model service refresh command

Culprit
main_lib.py

elif parser.getName() == "model_service_status":
        create_statements(cmd_pointer)  # <-- Move
        return model_service_status(cmd_pointer, parser)

[PhillipDowney]

Pulling on backlog for post Vnext