more units tests for @next and @previous

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10106 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
more units tests

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10107 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
cosmetics

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10108 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Update for upcoming Tomcat release

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10109 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c