Fix #1759, Grape integration, adds serialization_context

- improves improves serialization_context to take options and not depend
on a `request` object.
- adds descriptive error on missing serialization_context.
- Document overriding `CollectionSerializer#paginated?`.

test/adapter/json_api/pagination_links_test.rb

@@ -161,6 +161,17 @@ module ActiveModelSerializers
 
           assert_equal expected_response_without_pagination_links, adapter.serializable_hash
         end
+
+        def test_raises_descriptive_error_when_serialization_context_unset
+          render_options = { adapter: :json_api }
+          adapter = serializable(using_kaminari, render_options)
+          exception = assert_raises do
+            adapter.as_json
+          end
+          exception_class = ActiveModelSerializers::Adapter::JsonApi::PaginationLinks::MissingSerializationContextError
+          assert_equal exception_class, exception.class
+          assert_match(/CollectionSerializer#paginated\?/, exception.message)
+        end
       end
     end
   end