Multiple datatables on the same page with a config `div` results in `NullPointerException`

[fbristow]

Hi Thibault,
I've run into an issue where having multiple datatables on the same page and config div causes an unexpected NullPointerException. I created a minimal example with Spring WebMVC, Thymeleaf and Datatables Thymeleaf, which you can find here: https://github.com/fbristow/dandelion-springmvc/tree/multi-table-config-div

My solution to this problem for now is to switch to manually building the tables as I probably don't need datatables support on this page, but I figured I would report the issue with a minimal test case.