Update configs to match PSD-managed RabbitMQ

[dasunpubudumal]

Closes #

Changes proposed in this pull request

• Updates configs to point to PSD-managed RabbitMQ hosted at https://rmq-uat.psd.sanger.ac.uk.

Here's my attempt to explain a bit of the setup: https://ssg-confluence.internal.sanger.ac.uk/display/PSDPUB/PSD-managed+RabbitMQ+for+test+environments.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.50%. Comparing base (5f422ad) to head (4d787f7).
Report is 4 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4403      +/-   ##
===========================================
+ Coverage    86.40%   86.50%   +0.09%     
===========================================
  Files         1390     1390              
  Lines        29771    29771              
===========================================
+ Hits         25724    25753      +29     
+ Misses        4047     4018      -29     

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[sdjmchattie]

The changes look fine. Is this to move away from the ISG managed instance? I think I've missed some discussion related to this. Perhaps you can update me on Slack instead of in public.