Provide a Command Line Parameter to Run Test Suite in Sequential or Parallel Mode

The scenario is to change the execution mode (sequential or parallel) by changing a parameter say, executionMode, in the command used for Console Mode execution.
This would be helpful in CI integration as it would allow the user to change the execution mode (sequential to parallel) from the command itself. Else the user has to explicitly change the execution mode, commit the Test Suite Collection file and then start the execution.