The kerberos service name of gpdb and psql must match to allow proper
kerberos authentication. For linux platform this is controlled by
--with-krb-srvnam. For Windows platform it's hardcoded in template
pg_config.h.win32. We currently build gpdb server without specifying
--with-krb-srvnam, and the default value is "postgres". Change the
correspond value that hardcoded Windows config template to "postgres"
also.

- Package necessary kerberos utility with windows installer
- Add Kerberos auth test for Windows client