* Replace coalesce() usage for locals with ternary operator. Fixes terraform errors during destroy when only empty strings were passed to coalesce().
* Update changelog.
* Fix formatting.
* run terraform upgrade tool
* fix post upgrade TODOs
* use strict typing for variables
* upgrade examples, point them at VPC module tf 0.12 PR
* remove unnecessary `coalesce()` calls
coalesce(lookup(map, key, ""), default) -> lookup(map, key, default)
* Fix autoscaling_enabled broken (#1)
* always set a value for tags, fix coalescelist calls
* always set a value for these tags
* fix tag value
* fix tag value
* default element available
* added default value
* added a general default
without this default - TF is throwing an error when running a destroy
* Fix CI
* Change vpc module back to `terraform-aws-modules/vpc/aws` in example
* Update CHANGELOG.md
* Change type of variable `cluster_log_retention_in_days` to number
* Remove `xx_count` variables
* Actual lists instead of strings with commas
* Remove `xx_count` variable from docs
* Replace element with list indexing
* Change variable `worker_group_tags` to a attribute of worker_group
* Fix workers_launch_template_mixed tags
* Change override_instance_type_x variables to list.
* Update CHANGELOG.md
* Adding Worker ASG Option for termination_policies, default set to Default
* Adding setting to launch template and mixed
* Updated a few more things per PR notes
* Change termination_policy default from "Default" to ""
* Adding new mixed type of worker group with instance overrides and mixed instances policy
* moving all count and lifecycle rule parameters to top/bottom
* adding custom IAM parts
* updating doc with new options
* fixes for spot instances
* allow creating an IAM role for each worker group
* moved change from 'changed' to 'added'
* create multiple roles not just profiles
* fix config_map_aws_auth generation
* don't duplicate worker-role templating
* specify ARNs for worker groups individually
todo fix aws_auth configmap
* fixed AWS auth
* fix aws_iam_instance_profile.workers name
fix iam_instance_profile fallback
* fix outputs
* fix iam_instance_profile calculation
* hopefully fix aws auth configmap generation
* manually fill out remainder of arn
* remove depends_on in worker_role_arns template file
this was causing resources to be recreated every time
* fmt
* fix typo, move iam_role_id default to defaults map
* Allow additional security groups to be included for all workers and each worker group #47
* update changelog with reference to issue and be more descriptive
* Update CHANGELOG.md
* address pr comments and rebase
* rebase
* fix bug introduced by PR#115 that sets the AMI id to the default value of "" always
* rebase
* align default value of additional_security_group_ids to be pulled from local var workers_group_defaults_defaults
