Merge branch '22892-cycle-analytics-date-filter-is-not-working' into 'master'

Resolve "Cycle analytics date filter is not working"

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/22892

See merge request !6906
Signed-off-by: Rémy Coutable <remy@rymai.me>

CHANGELOG.md

 Please view this file on the master branch, on stable branches it's out of date.
 
 ## 8.13.1 (unreleased)
+
   - Fixed hidden pipeline graph on commit and MR page. !6895
+  - Fix Cycle analytics not showing correct data when filtering by date. !6906
 
 ## 8.13.0 (2016-10-22)
 

app/assets/javascripts/cycle_analytics.js.es6

@@ -36,7 +36,11 @@
         method: 'GET',
         dataType: 'json',
         contentType: 'application/json',
-        data: { start_date: options.startDate }
+        data: {
+          cycle_analytics: {
+            start_date: options.startDate
+          }
+        }
       }).done((data) => {
         this.decorateData(data);
         this.initDropdown();