This update adds Precision Time Protocol (PTP) monitoring
to the current list of inhouse developed collectd plugins.
Refer to the ptp.py header for a description of the monitoring
service algorithm and inline comments for detailed behavior.
Test Plan: see depends update commit message
Depends-On: https://review.openstack.org/#/c/647524
Change-Id: I3bf3dff7d6524764d745fe22ae80483c7d8a8b03
Story: 2002823
Task: 29492
Signed-off-by: Eric MacDonald <eric.macdonald@windriver.com>
dc2a540c1a