Fix for combined objective #9165

Job	Run time
Build SU2 (tsan) (BaseOMP-tsan)	12m 48s
Build SU2 (tsan) (ReverseOMP-tsan)	28m 40s
Build SU2 (asan) (ReverseNoMPI-asan)	45m 54s
Build SU2 (ForwardMPI)	12m 50s
Build SU2 (asan) (BaseNoMPI-asan)	17m 19s
Build SU2 (ReverseMPI)	15m 57s
Build SU2 (BaseMPI)	13m 48s
Build SU2 (ReverseTagNoMPI)	11m 29s
Build SU2 (BaseNoMPI)	8m 35s
Build SU2 (ForwardOMP)	11m 52s
Build SU2 (ReverseOMP)	15m 43s
Build SU2 (BaseOMP)	8m 57s
Build SU2 (ForwardNoMPI)	10m 46s
Build SU2 (ReverseNoMPI)	13m 23s
Tape Tests (serial_regression_AD.py)	2m 36s
Regression Tests (tutorials.py)	7m 52s
Regression Tests (vandv.py)	2m 27s
Regression Tests (hybrid_regression_AD.py)	3m 23s
Regression Tests (parallel_regression_AD.py)	8m 47s
Unit Tests (test_driver_AD)	1m 3s
Regression Tests (serial_regression_AD.py)	5m 35s
Regression Tests (parallel_regression.py)	13m 57s
Unit Tests (test_driver_DD)	1m 45s
Regression Tests (hybrid_regression.py)	11m 24s
Unit Tests (test_driver)	1m 10s
Regression Tests (serial_regression.py)	16m 27s
Thread Sanitizer Tests (hybrid_regression_AD.py)	11m 1s
Thread Sanitizer Tests (hybrid_regression.py)	27m 25s
Address Sanitizer Tests (serial_regression_AD.py)	6m 1s
Address Sanitizer Tests (serial_regression.py)	15m 19s
	6h 4m 13s

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