Increment UsageDataNonSqlMetrics spec db call count

Adding `license_billable_users` metric makes some new database calls, so
the spec 'guard' counter has to be changed as well.

ee/spec/lib/ee/gitlab/usage_data_non_sql_metrics_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe Gitlab::UsageDataNonSqlMetrics do
         described_class.uncached_data
       end
 
-      expect(recorder.count).to eq(52)
+      expect(recorder.count).to eq(54)
     end
   end
 end