Stabilize metadata tests

[YomesInc]

Brief Summary of Changes

What Does This PR Address?

• GitHub issue (Add reference - #XX)
• Refactoring
• New feature
• Bug fix
• Adds more tests

Are Tests Included?

• Yes
• No

Reviewer, Please Note:

Some details about changes:

• Q.all instead of Q.allSettled in before, since there is no reason to continue tests if setup failed
• metadata creation as a separate call before uploading to avoid potential race conditions
• retry of test fragments instead of entire tests - to be able to reuse the same approach in tests which upload files as part of the test.