Use context profile for libkadm5 configuration

In kadm5_get_config_params(), uxe the context profile instead of
creating a new one with krb5_aprof_init().

In kproplog, obtain the context with kadm5_init_krb5_context() so that
KDC configuration is used.

https://github.com/krb5/krb5/commit/49a857808b918440793daa81c8fe352326623fef
Author: Greg Hudson <ghudson@mit.edu>
Commit: 49a857808b918440793daa81c8fe352326623fef
Branch: master
 src/kprop/kproplog.c     |  2 +-
 src/lib/kadm5/admin.h    |  2 ++
 src/lib/kadm5/alt_prof.c | 24 ++----------------------
 3 files changed, 5 insertions(+), 23 deletions(-)