POLIO-1817: fix flaky test

[quang-le]

What problem is this PR solving? Explain here in one sentence.

Related JIRA tickets : POLIO-1817

Self proofreading checklist

• Did I use eslint and black formatters
• Is my code clear enough and well documented
• Are my typescript files well typed
• New translations have been added or updated if new strings have been introduced in the frontend
• My migrations file are included
• Are there enough tests
• Documentation has been included (for new feature)

Doc

NA

Changes

• Made the test independent of vaccine order

How to test

run the tests

Print screen / video

NA

Notes

Things that the reviewers should know:

• known bugs that are out of the scope of the PR
• other trade-offs that were made
• does the PR depends on a PR in bluesquare-components?
• should the PR be merged into another PR?

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fix: empty instance pop up

Refs: IA-3665

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