Convert non-managed intermediate nodes into AutoRoute documents

[mmenozzi]

This is a backport on 1.0 branch of the feature/bugfix for the Generic intermediates nodes which now will be converted in AutoRoute if needed.

[dantleech]

@WouterJ @dbu seems to be failing because of the deprecation notice, do we need to add SYMFONY_DEPRECATIONS_HELPER=weak to the travis environment?

[wouterj]

@dantleech no, we can fix the method calls (don't have to be done in this PR though).

[mmenozzi]

@dantleech can we go for the 1.0.2 ?

[dantleech]

@mmenozzi can you add the SYMFONY_DEPRECATIONS_HELPER=weak to the travis.yml file in this PR, e.g. https://github.com/symfony-cmf/RoutingAutoBundle/blob/master/.travis.yml#L18

Then the tests should be green and this PR will be mergable.

[wouterj]

@dantleech just fix the calls to use getParentDocument instead of getParent.

[dantleech]

@mmenozzi ^^ that :)

[mmenozzi]

@dantleech @WouterJ done! :)

[wouterj]

:+1:

[dantleech]

Have tagged 1.0.2.