DEV: Rails 5.2 upgrade and global gem upgrade

This updates tests to use latest rails 5 practice
and updates ALL dependencies that could be updated

Performance testing shows that performance has not regressed
if anything it is marginally faster now.

lib/admin_user_index_query.rb

@@ -63,7 +63,8 @@ class AdminUserIndexQuery
     if params[:stats].present? && params[:stats] == false
       klass.order(order.reject(&:blank?).join(","))
     else
-      klass.includes(:user_stat, :user_second_factor).order(order.reject(&:blank?).join(","))
+      klass.includes(:user_stat, :user_second_factor)
+        .order(order.reject(&:blank?).join(","))
     end
   end