Upgrade vaadin-parent to 2.2.1 (#1069)

Author: ZheSun88

pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.vaadin</groupId>
         <artifactId>vaadin-parent</artifactId>
-        <version>2.0.2</version>
+        <version>2.2.1</version>
     </parent>
 
     <artifactId>vaadin-spring-parent</artifactId>