[Snyk] Security upgrade rabbitmq from management to 3-management

[snyk-bot]

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• deploy/rabbitmq/Dockerfile

We recommend upgrading to rabbitmq:3-management, as this image has only 37 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	567	Exposure of Resource to Wrong Sphere SNYK-UBUNTU2004-EXPAT-2403778	No Known Exploit
	567	Improper Encoding or Escaping of Output SNYK-UBUNTU2004-EXPAT-2403934	No Known Exploit
	371	Integer Overflow or Wraparound SNYK-UBUNTU2004-EXPAT-2406812	No Known Exploit
	514	CVE-2021-3996 SNYK-UBUNTU2004-UTILLINUX-2387723	No Known Exploit
	514	CVE-2021-3995 SNYK-UBUNTU2004-UTILLINUX-2387728	No Known Exploit

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[codecov]

Codecov Report

Merging #26 (65bfdee) into master (d154cc3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #26   +/-   ##
=======================================
  Coverage   66.74%   66.74%           
=======================================
  Files           8        8           
  Lines         418      418           
  Branches       55       55           
=======================================
  Hits          279      279           
  Misses        139      139           

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