fix: limit start, end whitespace in bucket name

[staaldraad]

What kind of change does this PR introduce?

Bug fix

What is the current behavior?

Bucket names can have trailing whitespace. This can lead to name confusion and undeleteable buckets

What is the new behavior?

Bucket names can't start or end with spaces

[coveralls]

Pull Request Test Coverage Report for Build 15392185489

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 5 of 5 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 78.181%

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Totals
Change from base Build 15298566839:	0.02%
Covered Lines:	17332
Relevant Lines:	21999

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💛 - Coveralls