Closes #6306 - Console\RouteNotFoundStrategy invalid index

Solves an issue where the consoles RouteNotFoundStrategy would throw an exception because an arrays index 0 isn't defined.
Unfortunately I do not know what causes the problem exactly. It looks to me like it is some module I included. `getConsoleUsage` is quite complicated, that is why I tested the protected method directly. Analyzing the method and understanding what and how it does things could take some time on my side.