test: fold edge_betweenness()'s tests into test-centrality
#4200
| Job | Run time |
|---|---|
| 6m 18s | |
| 12m 2s | |
| 6m 30s | |
| 56m 30s | |
| 6m 28s | |
| 46m 0s | |
| 7m 16s | |
| 6m 46s | |
| 7m 48s | |
| 2h 35m 38s |