This PR was merged into the 2.2.x-dev branch.

Discussion
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Handle the ControllerResolverInterface::getArguments deprecation in tests

Fixes deprecation notices/failures due to the deprecation of `ControllerResolverInterface::getArguments()`:

1. `Silex\ControllerResolver` [is not used by Silex](https://github.com/silexphp/Silex/blob/master/src/Silex/Provider/HttpKernelServiceProvider.php#L37) when using HttpKernel >= 3.1.0, so I skipped the only test present in `ControllerResolverTest` with recent versions, as it failed when testing against HttpKernel v4  (master).

2. `ServiceControllerResolverTest::testShouldDelegateGetArguments()` only asserts that the deprecated method is called, so added a `@group legacy` to handle the notice, and skipped the test with v4 to prevent a warning (PHPUnit complains when you mock a non-existent method).

Commits
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c020cec4 Correctly handle the ControllerResolverInterface::getArguments deprecation in tests