[BUG] done() called multiple times in rosaenlg-node-server:test

[blegaut]

Describe the bug In the dev environment, sometimes the tests in rosaenlg-node-server:test will failwith the following message

 1) persistence
              cannot save template
                "after all" hook in "cannot save template":
            done() called multiple times in hook <persistence cannot save template "after all" hook in "cannot save template"> of file 

To Reproduce eventually run the tests on a Mac

Expected behavior The tests should run ok.

Code If applicable, RosaeNLG template code and/or additional code that trigger your problem.

Context:

• RosaeNLG version: 3.4.0
• Language: [e.g. en_US, fr_FR, etc.]
• Packaging: dev environnement

Additional context The problem is easily solved by adding a done. I am doing a PR

[ludans]

solved thanks to your PR #171