Comment 0 for bug 1864212

Please backport rabbitmq-server 3.8.2-0ubuntu1 (main) from focal to bionic.

Reason for the backport:
========================
3.6 is EOL since 31 May 2018, which only leave us with 3.8 as supported

For more details:
https://www.rabbitmq.com/versions.html

Note:
rabbitmq-server (3.8.2) depends on erlang (21.3 -> which is the minimum required) which depends on elixir (1.6.6)

None of theses depends are found in Bionic at the moment:
erlang | 1:20.2.2+dfsg-1ubuntu2 | bionic/universe | all
elixir | 1.3.3-2 | bionic/universe | all

A backport of the erlang and elixir will also be needed.

[Compatibility between Elixir and Erlang/OTP]
https://github.com/elixir-lang/elixir/blob/master/lib/elixir/pages/Compatibility%20and%20Deprecations.md

[RabbitMQ and Erlang/OTP Compatibility Matrix]
https://www.rabbitmq.com/which-erlang.html

Testing:
========
Mark off items in the checklist [X] as you test them, but please leave the checklist so that backporters can quickly evaluate the state of testing.

You can test-build the backport in your PPA with backportpackage:
$ backportpackage -u ppa:<lp username>/<ppa name> -s focal -d bionic rabbitmq-server

* bionic:
[ ] Package builds without modification
[X] rabbitmq-server installs cleanly and runs

Reverse dependencies:
=====================
The following reverse-dependencies need to be tested against the new version of rabbitmq-server. For reverse-build-dependencies (-Indep), please test that the package still builds against the new rabbitmq-server. For reverse-dependencies, please test that the version of the package currently in the release still works with the new rabbitmq-server installed. Reverse- Recommends, Suggests, and Enhances don't need to be tested, and are listed for completeness-sake.

rabbitmq-server
---------------
* debci-collector
  [ ] bionic (Reverse-Recommends)
* pybit-web
  [ ] bionic (Reverse-Suggests)
* syslog-ng-mod-amqp
  [ ] bionic (Reverse-Suggests)
* nagios-plugins-rabbitmq
  [ ] bionic (Reverse-Suggests)
* neutron
  [ ] bionic (Reverse-Testsuite-Triggers)
* ceilometer
  [ ] bionic (Reverse-Testsuite-Triggers)
* aodh
  [ ] bionic (Reverse-Testsuite-Triggers)
* debci
  [ ] bionic (Reverse-Testsuite-Triggers)
  [ ] bionic (Reverse-Build-Depends)
* nova
  [ ] bionic (Reverse-Testsuite-Triggers)
* ruby-bunny
  [ ] bionic (Reverse-Build-Depends)