upgrade parent to latest release
diff --git a/pom.xml b/pom.xml
index 32d36aa..c98b12c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
   <parent>
     <groupId>org.apache</groupId>
     <artifactId>apache</artifactId>
-    <version>22-SNAPSHOT</version>
+    <version>22</version>
     <relativePath>../asf/pom.xml</relativePath>
   </parent>