do not coerce hoverinfo if hovertemplate is defined

Author: antoinerg

src/plots/plots.js

@@ -1167,7 +1167,7 @@ plots.supplyTraceDefaults = function(traceIn, traceOut, colorIndex, layout, trac
 
         if(_module) {
             _module.supplyDefaults(traceIn, traceOut, defaultColor, layout);
-            Lib.coerceHoverinfo(traceIn, traceOut, layout);
+            if(!traceOut.hovertemplate) Lib.coerceHoverinfo(traceIn, traceOut, layout);
         }
 
         coerce('hovertemplate');

test/jasmine/tests/plots_test.js

@@ -251,6 +251,14 @@ describe('Test Plots', function() {
                 traceOut = supplyTraceDefaults(traceIn, {type: 'scatter'}, 0, layout);
                 expect(traceOut.hoverinfo).toEqual('name');
             });
+
+            it('only if hovertemplate is not defined', function() {
+                layout._dataLength = 1;
+
+                traceIn = {};
+                traceOut = supplyTraceDefaults(traceIn, {type: 'scatter', hovertemplate: '%{y}'}, 0, layout);
+                expect(traceOut.hoverinfo).toBeUndefined();
+            });
         });
     });