Attribute fixes

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11091 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Issue 5362:	column's filterValue only read from value expression but not from attribute

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11092 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c