flip default agent test bit to false on the sandbox config

git-svn-id: https://svn.apache.org/repos/asf/incubator/slider/trunk@1596191 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/clusters/sandbox/slider/slider-client.xml b/src/test/clusters/sandbox/slider/slider-client.xml
index 770ab9b..3a1658b 100644
--- a/src/test/clusters/sandbox/slider/slider-client.xml
+++ b/src/test/clusters/sandbox/slider/slider-client.xml
@@ -54,7 +54,7 @@
   <property>
     <name>slider.test.agent.enabled</name>
     <description>Flag to enable/disable Agent tests</description>
-    <value>true</value>
+    <value>false</value>
   </property>