Check only extensions for SCC activations

When checking the registry access if system is hybrid,
the check with SCC for the state of its activations should be done
only with non free extensions, as base product is not free

This Fixes that scenario

Author: jesusbv

engines/registry/app/models/access_scope.rb

@@ -87,7 +87,7 @@ def allowed_paths(system = nil)
     allowed_product_classes = (active_product_classes & access_policies_yml.keys)
     if system && system.hybrid?
       # if the system is hybrid => check if the non free product subscription is still valid for accessing images
-      allowed_non_free_product_classes = allowed_product_classes.map { |s| s unless Product.find_by(product_class: s).free? }
+      allowed_non_free_product_classes = allowed_product_classes.map { |s| s unless Product.find_by(product_class: s, product_type: 'extension').free? }.compact
       unless allowed_non_free_product_classes.empty?
         auth_header = {
           'HTTP_AUTHORIZATION' => ActionController::HttpAuthentication::Basic.encode_credentials(system.login, system.password)

engines/registry/spec/app/models/access_scope_spec.rb

@@ -194,7 +194,7 @@
           system
         end
         let(:product1) do
-          product = FactoryBot.create(:product, :with_mirrored_repositories)
+          product = FactoryBot.create(:product, :with_mirrored_repositories, :extension)
           product.repositories.where(enabled: false).update(mirroring_enabled: false)
           product.update(product_class: 'SLES15-SP4-LTSS-X86')
           product