8177085: Accept including .conf files in krb5.conf's includedir
Reviewed-by: jnimeh

8081347: Add @modules to jdk_core tests
Reviewed-by: alanb, joehw, lancea
Contributed-by: alexander.kulyakhtin@oracle.com, alan.bateman@oracle.com, mandy.chung@oracle.com

8029994: Support "include" and "includedir" in krb5.conf
Reviewed-by: mullan