fix(microservices): multiple rmq client urls issue #9364

[kamilmysliwiec]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number: #9364

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 5d58a3c2-559e-4daa-a51b-96aa5d515156

• 1 of 7 (14.29%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.08%) to 94.043%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/microservices/client/client-rmq.ts	1	7	14.29%

Files with Coverage Reduction	New Missed Lines	%
packages/microservices/client/client-rmq.ts	1	81.13%

Totals
Change from base Build 73a19d9e-28f7-4c3e-bdf0-1ec3a42dbc33:	-0.08%
Covered Lines:	5762
Relevant Lines:	6127

---

💛 - Coveralls

[rheh]

LGTM