Add new robustness extension tests

Add new robustness extension tests

New tests for KHR_robustness extension. Attempts to provoke context
reset scenarios and test GL state after a reset has occurred.

New test group:
- dEQP-EGL.functional.robustness.*

New tests:
- create_context.query_robust_access
- create_context.no_reset_notification
- create_context.lose_context_on_reset

- reset_context.shaders.infinite_loop.*   (various shaders)
- reset_context.shaders.out_of_bounds.*   (various resource types)
- reset_context.fixed_function_pipeline.* (index and vertex buffers)

- negative_context.invalid_robust_context_creation
- negative_context.invalid_robust_shared_context_creation

Note: Test groups ending in *_non_robust are for internal use only.

Change-Id: I91d7e3e95ec52f908dbaa1f49c56dcd94d60fd8f