Rename vulnerability_statistic factory traits

ee/spec/factories/vulnerabilities/statistics.rb

@@ -4,24 +4,24 @@ FactoryBot.define do
   factory :vulnerability_statistic, class: 'Vulnerabilities::Statistic' do
     project
 
-    trait :a do
+    trait :grade_a do
       info { 1 }
     end
 
-    trait :b do
+    trait :grade_b do
       low { 1 }
     end
 
-    trait :c do
+    trait :grade_c do
       medium { 1 }
     end
 
-    trait :d do
+    trait :grade_d do
       high { 1 }
       unknown { 1 }
     end
 
-    trait :f do
+    trait :grade_f do
       critical { 1 }
     end
   end

ee/spec/models/vulnerabilities/projects_grade_spec.rb

@@ -10,11 +10,11 @@ RSpec.describe Vulnerabilities::ProjectsGrade do
   let_it_be(:project_4) { create(:project, group: group) }
   let_it_be(:project_5) { create(:project, group: group) }
 
-  let_it_be(:vulnerability_statistic_1) { create(:vulnerability_statistic, :a, project: project_1) }
-  let_it_be(:vulnerability_statistic_2) { create(:vulnerability_statistic, :b, project: project_2) }
-  let_it_be(:vulnerability_statistic_3) { create(:vulnerability_statistic, :b, project: project_3) }
-  let_it_be(:vulnerability_statistic_4) { create(:vulnerability_statistic, :c, project: project_4) }
-  let_it_be(:vulnerability_statistic_5) { create(:vulnerability_statistic, :f, project: project_5) }
+  let_it_be(:vulnerability_statistic_1) { create(:vulnerability_statistic, :grade_a, project: project_1) }
+  let_it_be(:vulnerability_statistic_2) { create(:vulnerability_statistic, :grade_b, project: project_2) }
+  let_it_be(:vulnerability_statistic_3) { create(:vulnerability_statistic, :grade_b, project: project_3) }
+  let_it_be(:vulnerability_statistic_4) { create(:vulnerability_statistic, :grade_c, project: project_4) }
+  let_it_be(:vulnerability_statistic_5) { create(:vulnerability_statistic, :grade_f, project: project_5) }
 
   describe '.grades_for' do
     let(:compare_key) { ->(projects_grade) { [projects_grade.grade, projects_grade.project_ids.sort] } }

ee/spec/requests/api/graphql/project/vulnerability_severities_count_spec.rb

@@ -5,7 +5,7 @@ require 'spec_helper'
 RSpec.describe 'Query.project(fullPath).vulnerabilitySeveritiesCount' do
   let_it_be(:project) { create(:project) }
   let_it_be(:user) { create(:user) }
-  let_it_be(:statistic) { create(:vulnerability_statistic, :d, project: project) }
+  let_it_be(:statistic) { create(:vulnerability_statistic, :grade_d, project: project) }
 
   let_it_be(:query) do
     %(