RFR: 9: 8161011: Mark test/java/rmi/activation/ActivationGroup/downloadActivationGroup/DownloadActivationGroup.java as itnermittent

[Rajan Halade]

This test is seen to fail intermittently due to JDK-8085192. Please 
review following patch which marks it as intermittent.

diff -r 848c94ca6394 
test/java/rmi/activation/ActivationGroup/downloadActivationGroup/DownloadActivationGroup.java
--- 
a/test/java/rmi/activation/ActivationGroup/downloadActivationGroup/DownloadActivationGroup.java 
Thu Jul 07 14:16:58 2016 -0700
+++ 
b/test/java/rmi/activation/ActivationGroup/downloadActivationGroup/DownloadActivationGroup.java 
Thu Jul 07 15:55:14 2016 -0700
@@ -24,6 +24,7 @@
 /*
  * @test
  * @bug 4510355
+ * @key intermittent
  * @summary ActivationGroup implementations cannot be downloaded by 
default;
  * Creates a custom activation group without setting a security manager
  * in activation group's descriptor.  The custom activation group
Thanks,
Rajan