Only include aria range values once per utilization bar chart

We used to set aria range attributes for both the "used" and the
"remaining" parts. While we need both to nicely show a 100% bar chart,
it makes no semantic sense to present both to accessibility tools.

This patch drops the aria attributes on the remaining "progress-bar".

Author: huerlisi

src/charts/utilization-bar/utilization-bar-chart.html

@@ -9,7 +9,7 @@
         <span ng-if="!chartFooter && (!footerLabelFormat || footerLabelFormat === 'actual')"><strong>{{chartData.used}} of {{chartData.total}} {{units}}</strong> Used</span>
         <span ng-if="!chartFooter && footerLabelFormat === 'percent'"><strong>{{chartData.percentageUsed}}%</strong> Used</span>
       </div>
-      <div class="progress-bar progress-bar-remaining" aria-valuenow="{{100 - chartData.percentageUsed}}" aria-valuemin="0" aria-valuemax="100"
+      <div class="progress-bar progress-bar-remaining"
            ng-style="{width:(100 - chartData.percentageUsed) + '%'}" tooltip="{{100 - chartData.percentageUsed}}% Available">
       </div>
     </div>
@@ -26,7 +26,7 @@
           <span ng-if="(!chartFooter) && (!footerLabelFormat || footerLabelFormat === 'actual')" ng-style="{'max-width':layout.footerLabelWidth}"><strong>{{chartData.used}} {{units}}</strong> Used</span>
           <span ng-if="(!chartFooter) && footerLabelFormat === 'percent'" ng-style="{'max-width':layout.footerLabelWidth}"><strong>{{chartData.percentageUsed}}%</strong> Used</span>
         </div>
-        <div class="progress-bar progress-bar-remaining" aria-valuenow="{{100 - chartData.percentageUsed}}" aria-valuemin="0" aria-valuemax="100"
+        <div class="progress-bar progress-bar-remaining"
              ng-style="{width:(100 - chartData.percentageUsed) + '%'}" tooltip="{{100 - chartData.percentageUsed}}% Available">
         </div>
       </div>

test/charts/utilization-bar/utilization-bar.spec.js

@@ -39,9 +39,7 @@ describe('Directive: pfUtilizationBarChart', function() {
   });
 
   it("should set aria-valuenow values", function() {
-    remaining = angular.element(element).find('.progress-bar-remaining');
     used = angular.element(element).find('.progress-bar').not('.progress-bar-remaining');
-    expect(remaining.attr('aria-valuenow')).toBe("20");
     expect(used.attr('aria-valuenow')).toBe("80");
   });