JDK 9 RFR Demote java/lang/ProcessBuilder/Zombies.java to tier 2

[joe darcy]

Hello,

Until its recently increased intermittent failures are resolved, I'd 
like to demote from tier 1 to tier 2 the test 
java/lang/ProcessBuilder/Zombies.java. Patch below.

Thanks,

-Joe

diff -r c3fbc7c75b01 test/TEST.groups
--- a/test/TEST.groups    Wed Jul 06 17:10:36 2016 +0200
+++ b/test/TEST.groups    Wed Jul 06 09:44:23 2016 -0700
@@ -27,6 +27,7 @@

  tier1 = \
      :jdk_lang \
+    -java/lang/ProcessBuilder/Zombies.java \
      :jdk_util \
      -java/util/concurrent/ThreadPoolExecutor/ConfigChanges.java \
      -java/util/concurrent/forkjoin/FJExceptionTableLeak.java \
@@ -37,6 +38,7 @@
      tools/pack200

  tier2 = \
+    java/lang/ProcessBuilder/Zombies.java \
      java/util/concurrent/ThreadPoolExecutor/ConfigChanges.java \
      java/util/concurrent/forkjoin/FJExceptionTableLeak.java \
      :jdk_io \