Adapt order payment creation in failing specs

In the test setups here order.payments is empty

spec/controllers/api/v0/orders_controller_spec.rb

@@ -274,7 +274,7 @@ module Api
 
       before do
         order.finalize!
-        create(:check_payment, order: order, amount: order.total)
+        order.payments << create(:check_payment, order: order, amount: order.total)
         allow(controller).to receive(:spree_current_user) { order.distributor.owner }
       end
 

spec/features/admin/orders_spec.rb

@@ -65,7 +65,7 @@ feature '
     context "with a capturable order" do
       before do
         order.finalize! # ensure order has a payment to capture
-        create :check_payment, order: order, amount: order.total
+        order.payments << create(:check_payment, order: order, amount: order.total)
       end
 
       scenario "capture payment" do

spec/models/spree/order_spec.rb

@@ -1174,7 +1174,7 @@ describe Spree::Order do
       it "advances to complete state without error" do
         advance_to_delivery_state(order)
         order.next!
-        create(:payment, order: order)
+        order.payments << create(:payment, order: order)
 
         expect { order.next! }.to change { order.state }.from("payment").to("complete")
       end