[perf] use index based loop - renderChildren is called many times

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9572 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
[perf] use index based loop - behaviors are rendered many times

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9573 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c