…1268)

* Add deprecation warning when unknown types are present

* fix and add service tests

* remove export

* plug deprecation route

* add integration test for new route

* add unit test for getIndexForType

* add unit tests

* improve deprecation messages

* add FTR test

* fix things due to merge

* change the name of the deprecation provider

* improve message

* improve message again
# Conflicts:
#	src/core/server/saved_objects/saved_objects_service.ts