MPPLUGIN-33: Allow plugin-test directory to be changed

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@292059 13f79535-47bb-0310-9956-ffa450edef68

plugin/xdocs/properties.xml

@@ -31,6 +31,16 @@
           <th>Optional?</th>
           <th>Description</th>
         </tr>
+        <tr>
+          <td>maven.plugin.test.dir</td>
+          <td>Yes</td>
+          <td>
+            The directory that contains the project descriptor for
+            running the plugin tests. This should be relative to
+            <code>${basedir}</code>.
+            Default is <code>src/plugin-test</code>.
+          </td>
+        </tr>
         <tr>
           <td>maven.docs.src</td>
           <td>Yes</td>