Auto update pipeline fails

[nbrys]

When running the auto update pipeline, we get the following error:

`+ cd control-tower-release

• chmod +x control-tower-linux-amd64
• ./control-tower-linux-amd64 deploy concourse-id
  error ensuring config bucket exists before deploy: [error determining if bucket [] exists: [InvalidParameter: 1 validation error(s) found.

• minimum field size of 1, HeadBucketInput.Bucket.
  ]]`

[lextoumbourou]

Also experiencing this error with latest release: 0.8.2:

./control-tower-darwin-amd64 deploy --iaas AWS --region ap-southeast-2 some-id
error ensuring config bucket exists before deploy: [error determining if bucket [] exists: [InvalidParameter: 1 validation error(s) found.
- minimum field size of 1, HeadBucketInput.Bucket.

[gramidt]

@crsimmons - Would you be able to provide insight into the error listed above? I am also experiencing this issue and would be more than happy to help identify the root cause and provide a PR if needed. Thank you in advance for all of your help!

[gramidt]

@crsimmons @nbrys @lextoumbourou - I found the root cause and I will provide a PR shortly. I have patched on my end and testing it out now.