Fix aachen testcase #7953

Job	Run time
Build SU2 (BaseMPI)	13m 30s
Build SU2 (asan) (BaseNoMPI-asan)	16m 30s
Build SU2 (asan) (ReverseNoMPI-asan)	47m 8s
Build SU2 (ReverseMPI)	14m 48s
Build SU2 (ForwardMPI)	11m 45s
Build SU2 (tsan) (BaseOMP-tsan)	12m 10s
Build SU2 (BaseNoMPI)	7m 57s
Build SU2 (tsan) (ReverseOMP-tsan)	27m 43s
Build SU2 (ReverseNoMPI)	12m 33s
Build SU2 (ForwardNoMPI)	11m 20s
Build SU2 (BaseOMP)	7m 57s
Build SU2 (ReverseOMP)	15m 24s
Build SU2 (ForwardOMP)	11m 18s
Unit Tests (test_driver)	1m 27s
Regression Tests (vandv.py)	1m 41s
Unit Tests (test_driver_AD)	48s
Regression Tests (tutorials.py)	4m 58s
Unit Tests (test_driver_DD)	51s
Regression Tests (parallel_regression.py)	14m 35s
Regression Tests (parallel_regression_AD.py)	9m 59s
Regression Tests (serial_regression.py)	16m 7s
Regression Tests (serial_regression_AD.py)	5m 30s
Regression Tests (hybrid_regression.py)	10m 55s
Regression Tests (hybrid_regression_AD.py)	3m 22s
Thread Sanitizer Tests (hybrid_regression.py)	27m 15s
Thread Sanitizer Tests (hybrid_regression_AD.py)	10m 58s
Address Sanitizer Tests (serial_regression.py)	14m 47s
Address Sanitizer Tests (serial_regression_AD.py)	6m 29s
	5h 39m 45s

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