Adding ability to send cloud-init user-data to triton machines

[zero-below]

In Joyent's images, at least for ubuntu, user-data is used for joyent infrastructure and cloud-init needs to be uploaded to cloud-init:user-data instead of just user-data.

See notes in: https://docs.joyent.com/public-cloud/instances/virtual-machines/images/linux/ubuntu-certified#cloud-init-examples

Cloud-init data is provided as metadata with the cloud-init:user-data key. Joyent boot-time data is supplied as metadata with the user-data and user-script keys.

I've built and tested this in my own infrastructure in joyent, with v0.9.0. This successfully placed the key onto the machine, and a basic cloud-config template was applied.

#cloud-config
write_files:
-   content: test123
    owner: root:root
    path: /tmp/testfile123
    permissions: '0644'
EOF

ubuntu@dev-infra-01:~$ cat /tmp/testfile123 
test123ubuntu@dev-infra-01:~$

[jen20]

@zero-below Thanks for opening a pull request! I'm going to pull this down to rebase it and test locally prior to merging.

[jen20]

This has been merged in fcddc1d. Thanks @zero-below!

[ghost]

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