JDK 9 RFR of JDK-8151768: Consider moving pack200 tests to tier 1

[Amy Lu]

Currently tools/pack200 tests are defined to be part of tier 2 testing. 
The pack200 tests have a history of finding VM issue and they are good 
candidates for tier 1 testing, in which trying to cover VM-related 
functionality.

This patch is to move tools/pack200 tests from tier2 to tier1.

bug: https://bugs.openjdk.java.net/browse/JDK-8151768
webrev: http://cr.openjdk.java.net/~amlu/8151768/webrev.00/

Thanks,
Amy

--- old/test/TEST.groups	2016-05-24 13:44:38.000000000 +0800
+++ new/test/TEST.groups	2016-05-24 13:44:38.000000000 +0800
@@ -34,7 +34,8 @@
      sun/nio/cs/ISO8859x.java \
      java/nio/Buffer \
      com/sun/crypto/provider/Cipher \
-    :jdk_math
+    :jdk_math \
+    tools/pack200
  
  tier2 = \
      java/lang/ProcessHandle/TreeTest.java \
@@ -50,6 +51,7 @@
      -com/sun/crypto/provider/Cipher \
      :jdk_text \
      :core_tools \
+    -tools/pack200 \
      :jdk_other
  
  tier3 = \