code review request: 6950929: Failures on Solaris sparc 64bit sun/security/krb5/auto/BadKdc4.java (and linux?)

[Weijun Wang]

Hi Valerie

Code change for the BadKdc.java test:

     http://cr.openjdk.java.net/~weijun/6950929/webrev.00/

As described in the lines 44-69 of the new file, the test might fail due 
to 2 reasons:

1. KDC port opened by some other process (1%)
2. KDC cannot receive the first UDP packet (99%)

The fix includes:

1. Catch possible exceptions from cause #1 and ignore them
2. Send a packet to the KDC to warm it up. I really don't know why this 
is useful, but after this change, I've seen no more such failure.
3. More debug output if fail again

Thanks
Max