Fix mtk empty contraints creation and update rosenbrock example #1279

Job	Run time
test (Core, 1)	36m 4s
test (Core, 1.6)	19m 49s
test (OptimizationBBO, 1)	11m 59s
test (OptimizationBBO, 1.6)	16m 21s
test (OptimizationCMAEvolutionStrategy, 1)	10m 55s
test (OptimizationCMAEvolutionStrategy, 1.6)	15m 21s
test (OptimizationEvolutionary, 1)	13m 41s
test (OptimizationEvolutionary, 1.6)	11m 56s
test (OptimizationFlux, 1)	12m 9s
test (OptimizationFlux, 1.6)	12m 16s
test (OptimizationGCMAES, 1)	13m 12s
test (OptimizationGCMAES, 1.6)	13m 19s
test (OptimizationMetaheuristics, 1)	11m 1s
test (OptimizationMetaheuristics, 1.6)	16m 39s
test (OptimizationMOI, 1)	14m 27s
test (OptimizationMOI, 1.6)	18m 50s
test (OptimizationMultistartOptimization, 1)	12m 35s
test (OptimizationMultistartOptimization, 1.6)	13m 46s
test (OptimizationNLopt, 1)	14m 4s
test (OptimizationNLopt, 1.6)	13m 38s
test (OptimizationNOMAD, 1)	15m 54s
test (OptimizationNOMAD, 1.6)	13m 52s
test (OptimizationOptimJL, 1)	13m 40s
test (OptimizationOptimJL, 1.6)	15m 30s
test (OptimizationOptimisers, 1)	15m 22s
test (OptimizationOptimisers, 1.6)	13m 40s
test (OptimizationQuadDIRECT, 1)	13m 15s
test (OptimizationQuadDIRECT, 1.6)	15m 48s
test (OptimizationSpeedMapping, 1)	13m 6s
test (OptimizationSpeedMapping, 1.6)	12m 28s
test (OptimizationPolyalgorithms, 1)	15m 11s
test (OptimizationPolyalgorithms, 1.6)	15m 32s
	7h 55m 20s

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