AutoComplete cache and cacheTimeout feature

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@8875 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Bug Fix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@8876 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Bug Fix

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@8877 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c