Use aws provider level default_tags configuration

[reweeden]

This even applies to resources created within the cumulus modules, so we no longer need to pass the default tags in through the tags variable for the cumulus and data-persistence modules.

NOTE: This will generate a terraform diff for existing tagged resources because terraform tracks two separate tags* fields. tags are the resource specific tags which will no longer include the deployment tag while tags_all will include the resource specific tags merged together with the provider level defaults. Diffs should show that the tags field had the Deployment tag removed, while tags_all should remain unchanged (or in some cases have the Deployment tag added if that resource was not tagged before).

[lindsleycj]

looks good to me.

[mikedorfman]

Looks good to me!