Depend on released ONOS 2.2.1 artifacts

Change-Id: I83a2add65fb41b4984172633c460cc0751e83ff7
diff --git a/pom.xml b/pom.xml
index c06d31b..0ad98c0 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>