moved event to abstract base

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10187 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
#6270

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10188 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c