KNOX-2166 - Upgrade apache pom to 22

Signed-off-by: Kevin Risden <krisden@apache.org>
diff --git a/pom.xml b/pom.xml
index 2c789c8..3b45dfa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
-        <version>21</version>
+        <version>22</version>
     </parent>
 
     <groupId>org.apache.knox</groupId>