I only get one context in my test table, the system one. I would expect a front-page course to have been set up, but perhaps I am wrong about that.
More seriously, the system context has path /1/1 and depth 2. That should be path /1 and depth 1.
Also, the role assignments table is empty. Is that expected, I would have expected an assignment to admin, but again that might be a wrong expectation.
Apart from that, the rest of the roles stuff seems to have been set up correctly.