Update to RP standard release 3.5 (#29)

[leonardbf]

Update of cli-extension to the RP standard V3.5
Includes export policy and active directory functionality
Rename of anf commands to netappfiles
(internal netapp ticket nfsaas-2102)

---

This checklist is used to make sure that common guidelines for a pull request are followed.

General Guidelines

• Have you run ./scripts/ci/test_static.sh locally? (pip install pylint flake8 required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

[azuresdkci]

If this PR is for a new extension or change to an existing extension, use the following to try out the changes in this PR:

docker run -it microsoft/azure-cli:latest
export EXT=<NAME>
pip install --upgrade --target ~/.azure/cliextensions/$EXT "git+https://github.com/leonardbf/azure-cli-extensions.git@master#subdirectory=src/$EXT&egg=$EXT"

[leonardbf]

A review is still required here. Thanks.

[tjprescott]

There should be something here.

[leonardbf]

I will add something in the next release which is coming in the next couple of weeks.

[tjprescott]

LGTM.

[leonardbf]

Can this be merged or is there something still required? Thanks.

[tjprescott]

@leonardbf it looks like you need to pull the latest changes from master, but otherwise this can be merged.

[leonardbf]

@leonardbf it looks like you need to pull the latest changes from master, but otherwise this can be merged.

Ok, latest changes from master have now been merged to the fork.