Claranet-tfwrapper

NOTES:

- This version mitigates https://github.com/hashicorp/terraform/issues/14298. For long runs, clear the cached credentials in `.run`.
- Runs taking more than 1 hr cannot be supported from terraform `0.9.0` to at least `0.9.4`, so try to make good use of `target`.

UPDATES:

- TER-96: Add 15 minutes margin to AssumeRole renewal.

NOTES:

- Upgrade instructions: https://confluence.fr.clara.net/display/MT/Upgrade+to+Terraform+0.9

UPDATES:

- TER-85: Support Terraform 0.9.
- TER-87: Windows 10 compatibility.

UPDATES:

- TER-17: Add apply confirmation.
- TER-19: Implement soft state locking.
- TER-33: Fix stack detection for global environment.
- TER-39: Force -update on a terraform get.
- TER-57: do not fail to bootstrap when bootstrap is implicit.
- TER-59: Support ACLs for statefiles.

UPDATES:

- Add default value to template.

UPDATES:

- TER-30: Add support for template parameter during bootstrap.

UPDATES:

- TER-9: Support wrapper execution from anywhere.