Request for approval to 7u4 for CR 7077172: KerberosTime does not take into account system clock adjustement

[Weijun Wang]

Hi All

This is a request to backport a jdk8 fix into jdk7u4

   7077172: KerberosTime does not take into account system clock adjustement
   http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7077172

The fix is already included in jdk8 as:

   http://hg.openjdk.java.net/jdk8/tl/jdk/rev/5bfff9616b86
   reviewed by valeriep

The code changes for jdk7u4 are identical to the ones in jdk8. This is a 
regression to jdk 6. It's about an uncommon case where a user adjusts 
the system time during program execution. No regression test is provided 
since this is not easy to simulate.

I intend to push it to

    ssh://hg.openjdk.java.net/jdk7u/jdk7u-dev-gate/jdk

Thanks
Weijun