RFR 8186228: sun/security/krb5/auto/KdcPolicy.java fails with "java.lang.Exception: Does not match. Output is c30000c30000c30000"

[Weijun Wang]

Please take a review at

   http://cr.openjdk.java.net/~weijun/8186228/webrev.00/

Even a timeout of 30 seconds could happen, maybe because the UDP packet is 
lost. The change covers all possible output where each request has 3 chances of 
retry:

  without pre-auth   with pre-auth
  ----------------   ---------------
  OK                 OK
  OK                 ERR OK
  OK                 ERR ERR OK
  OK                 ERR ERR ERR        (failure)

  ERR OK             OK
  ....
  ERR ERR OK         ERR ERR OK
  ERR ERR OK         ERR ERR ERR        (failure)

  ERR ERR ERR                           (failure)

Thanks
Max