Add a feature gate in the apiserver to control whether paging can be
used. Add controls to the storage factory that allow it to be disabled
per resource. Use a JSON encoded continuation token that can be
versioned. Create a 410 error if the continuation token is expired.
Adds GetContinue() to ListMeta.
Kubernetes-commit: 8952a0cb722b77459cf2701632a30f5b264f5aba
update feature gates for generic apiserver
Add apiextensions-apiserver features to golint_failures
Ignore alpha feature if gate is disabled
Kubernetes-commit: 6ba1523a8e36c3121a9e08bfac7b4f342bb8ccb3