Integrate Neuvector with BB as a core package

Create all necessary Flux objects (gitrepo + helmrelease) and other required manifests (namespace, values secret, imagepullsecret, etc) to install NeuVector as a supported core package within Big Bang. Add values as necessary to the BB chart values. Ensure that CI is configured to install NeuVector based on the label neuvector and that all necessary test values are in place for CI. Also ensure necessary doc updates are included (package architecture being the primary requirement).

NeuVector should be a core package, but disabled by default initially (to prevent overlap with Twistlock).