Use dependency injection for console commands

[jwage]

Right now we rely on service location and Symfony console helper sets in order to get the dependencies for commands. This makes testing a pain and the code is less than ideal. We need to clean this up and rely on dependency injection for the commands.

[stof]

while this is fine for the usage in the Symfony bundle (we can configure commands there), it might be harder for the standalone CLI.

[goetas]

Should have been solved in #858

[goetas]

done in #898