Add local directive for chrony
Add local directive for chrony

The local keyword is used to allow chronyd to appear synchronised to
real time (from the viewpoint of clients polling it), even if it has no
current synchronisation source.

Change-Id: I27d945abb87a37d2fdf972a58c51e2f0994e3de8
Closes-Bug: #1688682

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible