upgrade parent version fix relativePath warning for m3

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1095311 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index d22f259..66791bc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,7 @@
     <groupId>org.apache.maven.shared</groupId>
     <artifactId>maven-shared-components</artifactId>
     <version>16</version>
+    <relativePath>../maven-shared-components/pom.xml</relativePath>
   </parent>
 
   <artifactId>file-management</artifactId>