add merge coverage script #9

Job	Run time
Tests with HiGHS (branch-and-bound/test_bab_knapsack_HiGHS)	8m 38s
Tests with modeling interface	3m 22s
Tests with HiGHS (branch-and-bound/test_bab_location_HiGHS)	9m 22s
Tests with HiGHS (branch-and-price/test_bap_assignment_HiGHS)	8m 46s
Tests with Mosek (branch-and-bound/test_bab_knapsack_Mosek)	8m 53s
Tests with GLPK (branch-and-bound/test_bab_knapsack_GLPK)	4m 3s
Tests with Mosek (branch-and-bound/test_bab_location_Mosek)	6m 43s
Tests with GLPK (branch-and-bound/test_bab_location_GLPK)	4m 8s
Tests with Mosek (branch-and-price/test_bap_assignment_Mosek)	8m 2s
Tests with GLPK (branch-and-price/test_bap_assignment_GLPK)	4m 22s
Upload coverage report	18s
	1h 6m 37s

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