add Debug logger for CG #115

Job	Run time
Tests with Mosek (branch-and-bound/test_bab_knapsack_Mosek)	11m 51s
Tests with GLPK (branch-and-bound/test_bab_knapsack_GLPK)	5m 23s
Tests with modeling interface	4m 16s
Tests with Mosek (branch-and-bound/test_bab_location_Mosek)	8m 22s
Tests with GLPK (branch-and-bound/test_bab_location_GLPK)	5m 32s
Tests with Mosek (branch-and-price/test_bap_assignment_Mosek)	11m 28s
Tests with HiGHS (branch-and-bound/test_bab_knapsack_HiGHS)	10m 40s
Tests with GLPK (branch-and-price/test_bap_assignment_GLPK)	6m 4s
Tests with HiGHS (branch-and-bound/test_bab_location_HiGHS)	6m 28s
Tests with HiGHS (branch-and-price/test_bap_assignment_HiGHS)	10m 21s
Upload coverage report	18s
	1h 20m 43s

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