Use the latest Apache Parent 8

git-svn-id: https://svn.apache.org/repos/asf/struts/maven/trunk@1043707 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom/pom.xml b/pom/pom.xml
index d7758bf..af13328 100755
--- a/pom/pom.xml
+++ b/pom/pom.xml
@@ -3,7 +3,7 @@
    <parent>
       <groupId>org.apache</groupId>
       <artifactId>apache</artifactId>
-      <version>7</version>
+      <version>8</version>
    </parent>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts-master</artifactId>