Add used but undeclared dependencies.

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@948173 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index aaaadfb..bc87f1a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -290,6 +290,12 @@
       <version>1.2</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.codehaus.plexus</groupId>
+      <artifactId>plexus-container-default</artifactId>
+      <version>1.0-alpha-9-stable-1</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <reporting>