Get rid of Jersey warn logs in webengine

Selenium tests show a bunch of warnings in logs that should be removed:

16:21:42,910 WARN [WebComponent] A servlet POST request, to the URI http://localhost:8080/nuxeo/site/sites/testwebsite1/search, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.
16:21:57,742 WARN [WebComponent] A servlet POST request, to the URI http://localhost:8080/nuxeo/site/sites/testwebsite1/testwebpage1/@webcomments, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.
16:22:01,038 WARN [NXAuditEventsService] Document associated to event does not exists anymore
16:22:04,244 WARN [WebComponent] A servlet POST request, to the URI http://localhost:8080/nuxeo/site/sites/testwebsite1/createWebPage, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.
16:22:07,825 WARN [WebComponent] A servlet POST request, to the URI http://localhost:8080/nuxeo/site/sites/testwebsite1/testwebpage2/modifyWebPage, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.
16:22:22,554 WARN [WebComponent] A servlet POST request, to the URI http://localhost:8080/nuxeo/site/sites/testwebsite1/testwebpage1/@tag/addTagging, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.