Fix aachen testcase #7956

Job	Run time
Build SU2 (asan) (BaseNoMPI-asan)	16m 21s
Build SU2 (tsan) (BaseOMP-tsan)	12m 51s
Build SU2 (asan) (ReverseNoMPI-asan)	45m 40s
Build SU2 (BaseMPI)	13m 25s
Build SU2 (tsan) (ReverseOMP-tsan)	28m 42s
Build SU2 (ReverseMPI)	14m 46s
Build SU2 (ForwardMPI)	12m 3s
Build SU2 (BaseNoMPI)	7m 50s
Build SU2 (ReverseNoMPI)	13m 4s
Build SU2 (ForwardNoMPI)	10m 7s
Build SU2 (BaseOMP)	8m 3s
Build SU2 (ReverseOMP)	15m 7s
Build SU2 (ForwardOMP)	10m 33s
Unit Tests (test_driver)	1m 28s
Unit Tests (test_driver_AD)	54s
Regression Tests (vandv.py)	2m 15s
Unit Tests (test_driver_DD)	1m 0s
Regression Tests (tutorials.py)	4m 38s
Regression Tests (parallel_regression.py)	13m 45s
Regression Tests (parallel_regression_AD.py)	8m 59s
Regression Tests (serial_regression.py)	16m 3s
Regression Tests (serial_regression_AD.py)	5m 14s
Regression Tests (hybrid_regression.py)	10m 43s
Regression Tests (hybrid_regression_AD.py)	3m 16s
Thread Sanitizer Tests (hybrid_regression.py)	27m 35s
Thread Sanitizer Tests (hybrid_regression_AD.py)	10m 57s
Address Sanitizer Tests (serial_regression.py)	14m 43s
Address Sanitizer Tests (serial_regression_AD.py)	5m 51s
	5h 35m 53s

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