Add Script to Run All test_scenarios and pedestrian_scenarios

[mchlswyr]

• Changed timeouts on some of the scenarios in scenarios/test_scenarios to allow all vehicles to reach their goal
• Added a script to run all scenarios in scenarios/test_scenarios and scenarios/pedestrian_scenarios
• The script will find all .osm files in both of those directories and try to run them with GSServer.py
• Press ENTER to run the next scenario, or CTRL + C to exit the script, when prompted
• While a scenario is running you can press CTRL + C to quit the scenario but not exit the script