CNS can miss NNC updates when its watch is down

[tyler-lloyd]

What happened:

CNS filters out NNC update events if a spec and status change are made while a watch is down.

What you expected to happen:

CNS should process added IPs to an NNC when it re-establishes its watch even if the spec has changed since the last time it saw it.

How to reproduce it:

Difficult to repro with CNS and NNCs. Better repro is to show that if you kill a watch on a controller and update a resource's spec and status, the controller will see 1 Update after it re-establishes the watch and the old and new object generations will be different.

Orchestrator and Version (e.g. Kubernetes, Docker):

Operating System (Linux/Windows):

Kernel (e.g. uanme -a for Linux or $(Get-ItemProperty -Path "C:\windows\system32\hal.dll").VersionInfo.FileVersion for Windows):

Anything else we need to know?:
[Miscellaneous information that will assist in solving the issue.]