Merge pull request #2050 from oscardssmith/rosenbrock-warnings #2170

Job	Run time
test (InterfaceI, 1)	24m 26s
test (InterfaceI, 1.6)	19m 28s
test (InterfaceII, 1)	18m 12s
test (InterfaceII, 1.6)	25m 15s
test (InterfaceIII, 1)	11m 36s
test (InterfaceIII, 1.6)	16m 34s
test (Integrators_I, 1)	27m 28s
test (Integrators_I, 1.6)	17m 8s
test (AlgConvergence_I, 1)	23m 51s
test (AlgConvergence_I, 1.6)	22m 40s
test (AlgConvergence_II, 1)	18m 14s
test (AlgConvergence_II, 1.6)	22m 29s
test (AlgConvergence_III, 1)	34m 24s
test (AlgConvergence_III, 1.6)	46m 27s
test (Downstream, 1)	16m 3s
test (Downstream, 1.6)	16m 57s
test (ODEInterfaceRegression, 1)	25m 42s
test (ODEInterfaceRegression, 1.6)	11m 31s
test (Multithreading, 1)	11m 24s
test (Multithreading, 1.6)	11m 51s
	7h 1m 40s

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