Added user data

[goruha]

What

• Added user data support

Why

• User data support required for some our projects

[const-bon]

Do we really need user data?
Why we don't use ansible for this purpose?

If the user data is changed, instance will be recreated.
But if we add changes to ansible playbook, instance will be re-provisioned without recreating.

[goruha]

@comeanother

Do we really need user data?

Yes we need.
I have project that does not use ansible.
@osterman want to start us reuse common code in different projects.
Eventually I believe we can use ansible on all projects, but for now tf_instance should be flexible enough
to start using it.

Why we don't use ansible for this purpose?

I do not want to add additional tool for small functionality.
I do not want to redo existed user_data scripts to ansible to make provision consisted in project

If the user data is changed, instance will be recreated.
But if we add changes to ansible playbook, instance will be re-provisioned without recreating.

True. But even in current situation if you will change github auth keys params instance would be rebuilded.
Also I do not see any problem in such behaviour.
I like that instances are immutable.

[drama17]

Why do you remove ?ref=tags/0.2.0? If this tag do not corresponds to the latest commit in master let me know, I can add new tag.

[goruha]

Nice catch. Sec

[goruha]

Done