Page Mgr Support: wrong use of isAssignableFrom

HstDocumentParamsUpdater for 12 used a check

if (obj instanceof HippoDocument)

before retrieving available translations.

On 13, there's an isAssignableFrom on dynamic clazz HippoDocument, but in the wrong order:

if (obj.getClass().isAssignableFrom(clazz)) {

should be

if (clazz.isAssignableFrom(obj.getClass())) {