* [issue-30] Optional elasticache_subnet_group ID
Add optional variable for the Elasticache subnet group ID so we can
create the replication group in an already existing subnet group.
* Update main.tf
Co-Authored-By: aknysh <[email protected]>
* Update variables.tf
Co-Authored-By: aknysh <[email protected]>
* Update variables.tf
Co-Authored-By: aknysh <[email protected]>
* Update main.tf
Co-Authored-By: aknysh <[email protected]>
* Address comments, update LICENSE, update descriptions, update `README`
* Update example
* Update README
