automate the removal of s3 buckets

[sonofagl1tch]

after cloudformation template is delete, the s3 buckets are kept if they have objects within them. We need to either add an option to choose buckets are deleted fully with a lambda function or some other solution.

ideas

• https://stackoverflow.com/questions/40383470/can-i-force-cloudformation-to-delete-non-empty-s3-bucket/40383846
• https://techblog.realtor.com/empty-trash-deleting-stack/

[mgmacias95]

In addition to that, we should remove the DeletionPolicy field since now it isn't removing any bucket, regardless of the data it contains:

AWSDetonationLab/awsDetonationLab.template

Lines 1480 to 1484 in 8d92a32

	"S3BucketCloudTrail": {
	"DeletionPolicy": "Retain",
	"Type": "AWS::S3::Bucket",
	"Properties": {}
	},