zebra: set inactive bit when zebra re-installs the MAC on dplane del

zebra: set inactive bit when zebra re-installs the MAC on dplane del

When a local mac is deleted by the dataplane zebra can re-install it
if the MAC is a SYNC MAC (learned from ES peers). The "local_inactive"
bit must be set as a part of the re-install to prevent zebra turning
around and advertising the MAC as locally active.

Also fixed up some debug logs in the slow-fail path to include the VNI.

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>