Move all variables out to separated files

[gloovers]

Description

All string variables are moved to separated variables.mk files which are sourced anyway

Test

1. make terraform.plan

Plan: 9 to add, 0 to change, 0 to destroy.

------------------------------------------------------------------------

This plan was saved to: /XXXXXX/.infra/env/dev/.terraform/tfplan

To perform exactly these actions, run the following command to apply:
    terraform apply "/XXXXXX/.infra/env/dev/.terraform/tfplan"

Releasing state lock. This may take a few moments...

2. make terraform.limits

This plan was saved to: /XXXXXX/.infra/env/dev/.terraform/tfplan

To perform exactly these actions, run the following command to apply:
    terraform apply "/XXXXXX/.infra/env/dev/.terraform/tfplan"

Releasing state lock. This may take a few moments...


[OK] aws_s3_bucket limit 
[OK] aws_route53_health_check limit 
[OK] aws_dynamodb_table limit 
[OK] aws_eip limit

[AutomationD]

Looks good, thank you