Set 'None' service as default (#787)

Author: maciaszczykm

src/app/frontend/deploy/portmappings.html

@@ -16,7 +16,7 @@
 
 <md-input-container class="md-block">
   <label>Service</label>
-<md-select ng-model="ctrl.serviceType" ng-change="ctrl.changeServiceType()">
+<md-select ng-model="ctrl.serviceType" ng-change="ctrl.changeServiceType()" required>
   <md-option ng-repeat="serviceType in ctrl.serviceTypes" ng-value="serviceType">
     {{serviceType.label}}
   </md-option>

src/app/frontend/deploy/portmappings_controller.js

@@ -67,7 +67,7 @@ export default class PortMappingsController {
      * Selected service type. Binding to outer scope.
      * @export {ServiceType}
      */
-    this.serviceType;
+    this.serviceType = NO_SERVICE;
   }
 
   /**