WIP: Demonstrate basic ASG integration with lifecycle hooks

[ketzacoatl]

As a first pass, getting an example working, this looks great!

Reviewing in detail, I would recommend the following updates:

• Lifecycled should be installed from https://github.com/buildkite/lifecycled/releases
  • Some clients will want to build/publish all artifacts used, while most will want to use what is released from upstream.
• ATM all the lifecycled stuff is in a single module, though that would not be useful to a client project. It would be better to break up specific functionality into separate modules, or leave some of the resources in the root of the example
  • We already have an asg module, but there are going to be issues with the initial_lifecycle_hook block. TF 0.12.x would address that. For now, we might want to just have two asg modules, merging them after we update the codebase to support 0.12.x
  • Separate the cloud init from the ASG it is applied to, those should be de-coupled, as we will run different init on a client
  • The IAM resources should be separated from the ASG itself
• Using cloudwatch here might be useful for debugging the example, but makes the code less reusable, so I would drop that.
• Overall, an example should provide guidance on what is needed, but also help reduce the amount of copy/paste - eg, grab these modules and you are good. ATM there is too much that we would need to change when applying to a client project, but the updates noted above ought to help clear that up.
• We want the example to primarily focus on what is required to run lifecycled.

It's not necessary now, but just as a heads up, I'll want to squash down the commits (can be more than 1 commit, but should be a clear logical flow without the sausage making)..

It would also be great to add to this PR, some example output or screenshots that confirm the lifecycle hooks are functional.

[psibi]

Some updates:

• lifecycled is now installed from github release
• Removed cloudwatch dependency in the infrastructure

But there are still some points which needs to addressed from your above comments which I will work on.

[psibi]

Some updates from last changes:

• Remove the lifecycled-module
• Introduce new module named asg-lifecycle for Auto scaling group with lifecycle hooks enabled
• De-register the instance from ELB from the lifecycle handler

[ketzacoatl]

This resolves https://github.com/fpco/terraform-aws-foundation/issues/188