Specify minTickSize: 1 since there aren't fractional documents.

Author: tung-jin-chew-hp

webapp/core/src/main/public/static/js/find/app/page/search/results/dategraph/dategraph-view.js

@@ -167,10 +167,16 @@ define([
                     }
                 }))
 
+                var yaxes = [{ minTickSize: 1 }];
+
+                if (multiAxes) {
+                    yaxes.push({ minTickSize: 1, position: 'right' });
+                }
+
                 $.plot($contentEl[0], data, {
                     grid: { hoverable: true },
                     xaxis: {mode: 'time'},
-                    yaxes: multiAxes ? [ {}, { position: 'right' } ] : {}
+                    yaxes: yaxes
                 })
 
                 this.$('.dategraph-view-pptx').removeClass('disabled');