Hosting Partners: Provisioning script can now send SSH credentials.

[poisa]

Changes proposed in this Pull Request:

The partner-provision.sh script is basically a client that calls the Jetpack Start API /provision endpoint. While D29544-code updates this endpoint to accept SSH credentials, this PR updates the shell script that calls that endpoint.

Is this a new feature or does it add/remove features to an existing part of Jetpack?

This updates an existing feature. Previously the provisioning script could not send SSH credentials. This PR allows it to do so thus making setting up VaultPress / Rewind easier for hosting partners.

For more info, see parMIr-cg-p2

Testing instructions:

1. Create a new Jurassic Ninja site and take note of its SSH access credentials.
2. Grab a hosting partner id and secret (Team Catalyst can provide you with one).
3. Checkout this branch.
4. Run the following command, replacing the strings in CAPS with your own

./bin/partner-provision.sh \
--partner_id=PARTNER_ID \
--partner_secret=PARTNER_SECRET \
--user=1 \
--plan=premium \
--url=JURASSIC_NINJA_URL \
--ssh-host=JURASSIC_NINJA_HOST \
--ssh-user=JURASSIC_NINJA_SSH_USER \
--ssh-pass=JURASSIC_NINJA_SSH_PASSWORD

The output of this command should be a JSON object. Make sure ssh_set is true and ssh_error is an empty string.

Note: For prettier JSON output, you can pipe the output of this command to jq.

Proposed changelog entry for your changes:

• Add ability to send SSH credentials via bin/partner-provision.sh.

[jetpackbot]

Thank you for the great PR description!

When this PR is ready for review, please apply the [Status] Needs Review label. If you are an a11n, please have someone from your team review the code if possible. The Jetpack team will also review this PR and merge it to be included in the next Jetpack release.

Scheduled Jetpack release: August 6, 2019.
Scheduled code freeze: July 30, 2019

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[oikeme]

LGTM 👍