A small build test for <classloader>

I don't know how this can be included in the junit tests
( at least the part that loads optional tasks ) since the
test env already includes most classes.

In order to test - you need to run this without junit.jar
in ant/lib and to pass the path to junit.jar

PR:
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git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273686 13f79535-47bb-0310-9956-ffa450edef68

src/etc/testcases/taskdefs/classloader.xml

@@ -0,0 +1,23 @@
+<project name="classloader-test" default="main" basedir=".">
+
+  <target name="init">
+
+    <path id="myJars" >
+      <!-- both ant-junit.jar and junit.jar must be loaded from the same path -->
+      <pathelement path="${ant.home}/lib/ant-junit.jar" />
+      <pathelement path="${junit.jar}" />
+    </path>
+
+    <classloader pathRef="myJars" 
+                 reverse="true" >
+      
+    </classloader>
+    <junit />
+  
+  </target>
+
+  <target name="main" depends="init">
+    <echo message="Found JUNIT" />
+  </target>
+
+</project>