JDK 9 RFR of JDK-8157487: Mark ZoneId.java as intermittently failing

[Joseph D. Darcy]

Hello,

The test
    sun/net/www/protocol/http/ZoneId.java

has been seen to intermittently fail (JDK-8085785) and should be marked 
accordingly. Please review the patch below which does this.

Thanks,

-Joe

--- a/test/sun/net/www/protocol/http/ZoneId.java    Fri May 20 14:41:41 
2016 -0700
+++ b/test/sun/net/www/protocol/http/ZoneId.java    Fri May 20 14:53:51 
2016 -0700
@@ -24,6 +24,7 @@
 /*
  * @test
  * @bug 8027308
+ * @key intermittent
  * @modules java.base/sun.net.www.protocol.http
  * @summary  verifies that HttpURLConnection does not send the zone id 
in the
  *           'Host' field of the header: