tree 8022b3eb7b2188716eb3649d8f12543e3b9ddb18
parent b9cfcb167c2cbe01ea37cf1edd4e3dd9915b78d0
author npujar <Nikhil.Pujar@radisys.com> 1579186065 +0530
committer Kent Hagerman <khagerma@ciena.com> 1580833540 -0500

VOL-2180 context changes in voltha-go

Passed context up as far as possible.
Where context reached the gRPC api, the context is passed through directly.
Where context reached the kafka api, context.TODO() was used (as this NBI does not support context or request cancelation)
Anywhere a new thread is started, and the creating thread makes no attempt to wait, context.Background() was used.
Anywhere a new thread is started, and the creating thread waits for completion, the ctx is passed through from the creating thread.
Cancelation of gRPC NBI requests should recursively cancel all the way through to the KV.

Change-Id: I7a65b49ae4e8c1d5263c27d2627e0ffe4d1eb71b