Allow filtering by classification

ee/app/controllers/projects/licenses_controller.rb

@@ -68,6 +68,10 @@ module Projects
     def matching_policies_from(license_compliance)
       if params[:detected]
         license_compliance.detected_policies
+      elsif params[:classifications].present?
+        license_compliance.policies.find_all do |policy|
+          params[:classifications].include?(policy.classification)
+        end
       else
         license_compliance.policies
       end

ee/spec/controllers/projects/licenses_controller_spec.rb

@@ -178,7 +178,7 @@ describe Projects::LicensesController do
               get :index, params: {
                 namespace_id: project.namespace,
                 project_id: project,
-                classification: ['allowed']
+                classifications: ['allowed']
               }, format: :json
             end