Fixed unable to find Leaflet.PolylineDecorator for tests

Author: eugenehuangsg

test/karma.conf.js

@@ -30,7 +30,7 @@ module.exports = (karma) => {
             'test/unit/bootstrap.coffee',
             'test/unit/**/*.js',
             'test/unit/**/*.coffee',
-            'bower_components/Leaflet.PolylineDecorator/leaflet.polylineDecorator.js',
+            'bower_components/Leaflet.PolylineDecorator/dist/leaflet.polylineDecorator.js',
             //do not include those specs for jasmine html runner by karma kama_jasmine_runner.html
             {pattern:'test/**/**/*.coffee', included: false},
             {pattern: 'dist/**/*.js.map', included: false}