convert alias orderable to method

method supports_order? is no longer available, so changing aliases

ui-classic calls `validate_{action}`, so it is possibly used
ServiceTemplate and OrchestrationTemplate call `orderable?`
Leaving that around

app/models/service_template.rb

@@ -78,9 +78,14 @@ class ServiceTemplate < ApplicationRecord
       'Service template is not configured to be displayed'
     end
   end
-  alias orderable?     supports_order?
-  alias validate_order supports_order?
 
+  def orderable?
+    supports?(:order)
+  end
+
+  def validate_order
+    supports?(:order)
+  end
 
   def self.with_tenant(tenant_id)
     tenant = Tenant.find(tenant_id)

spec/models/service_template_spec.rb

@@ -1142,19 +1142,19 @@
     end
   end
 
-  context "#supports_order?" do
+  context "#supports?(:order)" do
     context 'when service_template cannot be displayed' do
       it "returns the expected boolean value" do
         st = FactoryBot.create(:service_template, :service_template_catalog => FactoryBot.create(:service_template_catalog), :display => false)
-        expect(st.supports_order?).to eql(false)
+        expect(st.supports?(:order)).to eql(false)
         expect(st.unsupported_reason(:order)).to eq('Service template is not configured to be displayed')
       end
     end
 
     context 'when service_template can be displayed' do
       it "returns the expected boolean value" do
         st = FactoryBot.create(:service_template, :service_template_catalog => FactoryBot.create(:service_template_catalog), :display => true)
-        expect(st.supports_order?).to eql(true)
+        expect(st.supports?(:order)).to eql(true)
       end
     end
   end