upgrade to commons-parent-7

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/proxy/trunk@612219 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index df01bcd..b72980d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-parent</artifactId>
-        <version>6</version>
+        <version>7</version>
     </parent>
     <artifactId>commons-proxy</artifactId>
     <version>1.0-SNAPSHOT</version>