[Routing] trigger deprecation warning for deprecated features that will be removed in 2.3
adjusted tests to not use RouteCollection::getPrefix
adjust tests to no use addPrefix with options
refactor interator test that was still assuming a tree
added tests for remove() that wasnt covered yet and special route name
adjust RouteCollectionTest for the addCollection change and refactor the tests to only skip the part that really needs the config component
added tests for addDefaults, addRequirements, addOptions
add test for uniqueness of resources
adjust routing tests to not use prefix in addCollection
remove() should not use deprecated getParent() so it does not trigger deprecation internally