fix #1412: add 'no-cache' header in ajax responses (otherwise msie will not see dashboard updates
fix #1412: add 'no-cache' header in ajax responses (otherwise msie will not see dashboard updates

manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump