GitLab

1.Support pytorch-operator
2.remove unsupported operator

move nnictl folder
delete kubernetsServer in nnictl
refactor aks document
add warning information to expand relative path
update experiment status when the experiment crashed.

* Remove unused kubernetesServer config entry in config file and schema validation

* Add document for installing NFS client

1.Add kubeflow in experiment config document
2.Add AKS in kubeflow document

* Kubeflow training service documentation, v1

* Fix typos based on comments