Filter improvement

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9469 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Added a fallback check for JSF 2.2 detection.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9470 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c