1.7.0 mismatch in parameters

[cobrowserAlex]

Thanks for a great bundle!

one small thing: if i install 1.7.0 i get:

  [RuntimeException]
  An error occurred when executing the "'cache:clear --no-warmup'" command:

    [Symfony\Component\DependencyInjection\Exception\InvalidArgumentException]
    The parameter "cachetool.apc" must be defined.

seems like it should be looking for 'cache_tool', 1.6.2 works fine ;-)