fixup calendar on hover handling & add test

Author: etpinard

src/plots/gl3d/scene.js

@@ -59,9 +59,8 @@ function render(scene) {
 
     function formatter(axisName, val) {
         var axis = scene.fullSceneLayout[axisName];
-        var calendar = trace[axis._id.charAt(0) + 'calendar'];
 
-        return Axes.tickText(axis, axis.d2l(val, 0, calendar), 'hover').text;
+        return Axes.tickText(axis, axis.d2l(val), 'hover').text;
     }
 
     var oldEventData;

test/jasmine/tests/gl_plot_interact_test.js

@@ -155,6 +155,12 @@ describe('Test gl plot interactions', function() {
                 .then(hover)
                 .then(function() {
                     assertHoverText('x: Mar 3, 2017', 'y: c', 'z: 100k');
+
+                    return Plotly.relayout(gd, 'scene.xaxis.calendar', 'chinese');
+                })
+                .then(hover)
+                .then(function() {
+                    assertHoverText('x: 二 6, 2017', 'y: c', 'z: 100k');
                 })
                 .then(done);
             });