tree b5ed604f00e19f6a8703e17803a2e927ec066a14
parent 1e0f3e8d797e3195ce36950c96c11211f5b98c08
author pierventre <pier@opennetworking.org> 1622543196 +0200
committer Pier Luigi Ventre <pier@opennetworking.org> 1624281421 +0000

[SDFAB-199] Add the support for last-change

- Add parsing in OpenConfigGnmiDeviceDescriptionDiscovery and
  defaults to 0 for the devices not providing last-change
- Remove hack in OpenConfigGnmiPortStatisticsDiscovery and set
  the duration to 0 for the devices that do not support last-change
- Subscribe to the state changes of a given port and add parsing of
  last-change timestamp in GnmiDeviceStateSubscribe

Note that if the device does not aggregate updates into a single notification
two PORT_UPDATED events will be generated. The first as consequence of the
operational status change and the second caused by the reconciliation which
updates correctly last-change

Change-Id: I6b2cb3652b306358bd9e701780946864a1ed324b