Fixes MPABBOT-2. Added testPlugin goal with explanation that this plugins requires manual testing.

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@115523 13f79535-47bb-0310-9956-ffa450edef68

abbot/src/plugin-test/maven.xml

@@ -2,11 +2,15 @@
 
 <project xmlns:j="jelly:core">
 
+  <goal name="testPlugin">
+    <echo>This plugin must be tested manually (with the testPlugin-manual goal) as it requires defining a build.properties containing environment-dependent configuration.</echo>
+  </goal>
+
   <!-- Note: We're not naming this goal testPlugin voluntarily. The 
        reason is that in order for the test to run fine, the user must
        create a build.properties file in sample-webstart. The test also
        runs only on windows for now, WebStart must be installed and some
-       environment varibale must be set. -->
+       environment variable must be set. -->
 
   <goal name="testPlugin-manual">
   	<j:set var="goal" value="dist"/>