I am guessing you have attempted to install your JSF webapp into the same
Tomcat in which OWF is running? Be aware that that is not necessary. Widgets
can be served from other servers and even other domains. Feel free to use
Glassfish to serve your widgets.
If you do specifically want to use JSF in Tomcat, I don't think that is
something that Tomcat supports out of the box. You would likely need to do
some research to figure out what jars and configurations to add in order to
make that work.
Ross Pokorny