Great, sounds good for testing purposes but I'm not sure that is the best for productions applications. Imagine that if you put multiple applications on the same tomcat instance and one application consume all the memory, your jBPM console will stop working as well as all your task clients, because the task server is running inside tomcat.
This idea also breaks the scalability that gives you the Task Server running decoupled from tomcat in a different JVM instance.
But if it works for you congrats!