switch to pure Phase I in case RMP fails when artificial variables ar… #102

Job	Run time
Tests with Mosek (branch-and-bound/test_bab_knapsack_Mosek)	10m 15s
Tests with modeling interface	4m 59s
Tests with GLPK (branch-and-bound/test_bab_knapsack_GLPK)	3m 24s
Tests with Mosek (branch-and-bound/test_bab_location_Mosek)	5m 7s
Tests with HiGHS (branch-and-bound/test_bab_knapsack_HiGHS)	7m 25s
Tests with GLPK (branch-and-bound/test_bab_location_GLPK)	5m 6s
Tests with Mosek (branch-and-price/test_bap_assignment_Mosek)	9m 53s
Tests with HiGHS (branch-and-bound/test_bab_location_HiGHS)	11m 36s
Tests with GLPK (branch-and-price/test_bap_assignment_GLPK)	6m 54s
Tests with HiGHS (branch-and-price/test_bap_assignment_HiGHS)	8m 8s
Upload coverage report	27s
	1h 13m 14s

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