Added new scenarios

[MathiasPechinger]

Added several test scenarios defined by OpenScenario definitions, including an OpenDrive map. Available tests are:

• intersection left turn
• intersection right turn
• intersection straight
• intersection right turn with conflicting traffic from left
• intersection right turn with leading vehicle
• normal corner drive
• tight corner drive
• road fully blocked
• road partially blocked
• simple following

[arminstr]

Thanks for adding the testing scenarios!