Make helm charts and scripts compatible to deploy FfDL on any namespa…

…ce (#110)

* make helm charts and scripts compatible to deploy FfDL on any namespace

* allow users to export all the enviornment variables in a txt file

* Update readme with new notice

* Fix typo

* Update static volumes config v2 namespace parameter

* capitalize NAMESPACE, update Makefile, developer guide, and trobleshooting.

Update ART notebook(s) after PR #79 (#116)

* Update ART Notebook after PR #79

- Load cluster configuration from environment variables
- Require PUBLIC_IP and KUBECONFIG instead of CLUSTER_NAME and VM_TYPE
- Use storage type "mount_cos" (s3fs) instead of "s3_datastore"

* Update ART demo notebook after PR #79

- Load cluster configuration from environment variables
- Require PUBLIC_IP and KUBECONFIG instead of CLUSTER_NAME and VM_TYPE
- Use storage type "mount_cos" (s3fs) instead of "s3_datastore"