JDK 9 RFR of 8150206: Demote LFMultiThreadCachingTest.java to tier 2 until resolution of JDK-8150014

[joe darcy]

Hello,

Right now, we are seeing some cross-platform intermittent failures of

     java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java

as noted in bug JDK-8150014. Until that test instability is resolved, 
the test should be demoted from tier 1 to tier 2.

Please see the patch below.

(Circumstantial evidence points to the changes in JDK-8145485 being 
involved.)

-Joe

diff -r 3973fe856db2 test/TEST.groups
--- a/test/TEST.groups    Wed Feb 17 12:47:35 2016 -0800
+++ b/test/TEST.groups    Thu Feb 18 16:44:40 2016 -0800
@@ -29,6 +29,7 @@
      :jdk_lang \
      -java/lang/ProcessHandle/TreeTest.java \
      -java/util/zip/TestLocalTime.java \
+    -java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java \
      :jdk_util \
      -java/util/WeakHashMap/GCDuringIteration.java \
      -java/util/concurrent/ThreadPoolExecutor/ConfigChanges.java \
@@ -39,6 +40,7 @@
      :jdk_math

  tier2 = \
+    java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java \
      java/lang/ProcessHandle/TreeTest.java \
      java/util/zip/TestLocalTime.java \
      java/util/WeakHashMap/GCDuringIteration.java \