With this patch:
- Heatmap pages are API (stack) driven.
- All the heatmaps that were previously hardcoded on UI are now retrieved from API. In addition other heatmap definitions are added in the stack.
- Dashboard->Heatmap page also has service specific heatmaps (same as in earlier releases of Ambari)
- Last visited heatmap widget on a specific heatmap section is saved in the widget layout and shown as default heatmap on navigation to that heatmap page next time. (As opposed to the current behavior where the 1st heatmap in the hardcoded list is always shown by default on the heatmap page)