Issue 49106 - Move ds_* scripts to libexec
    
    Bug Description:
    Binaries like
    /usr/sbin/ds_selinux_enabled
    /usr/sbin/ds_selinux_port_query
    /usr/sbin/ds_systemd_ask_password_acl
    
    are not user-runnable, they are executed by other programs (setup-ds.pl
    for example). They should not reside in /usr/sbin, since it's used for
    storing binaries for system administration. Instead they should be placed
    in /usr/libexec/dirsrv/ which is designed to store binaries that are
    executed by other programs.
    
    Fix Description:
    Change install path to libexec.
    
    https://pagure.io/389-ds-base/issue/49106
    
    Reviewed by: mhonek, wibrown (Thanks!)