Depend on released ONOS 2.2.1 artifacts

Change-Id: Ic6575447499e0e50749b236b7d63b845ddafe57c
diff --git a/pom.xml b/pom.xml
index f7e9dfe..3d0f0fe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-dependencies</artifactId>
-        <version>2.2.1-b3</version>
+        <version>2.2.1</version>
     </parent>
 
     <groupId>org.opencord</groupId>