Lookup plugin for rabbitmq (#44070)

* Adding a basic get lookup for rabbitmq.

* Always return a list

* If content type is JSON, make accessible via dict.

* Fixed incorrect json.loads variable and missing raise

* Change to document returned data

* Fixed pep8 issues

* Adding integration testing

* Moving lookup intgration tests to new target

* New rabbitmq lookup plugin (#44070).

* New rabbitmq lookup plugin (#44070).

* PR review feedback updates

* Testing pika is installed

* Minor mods to tests

* Check if connection is already closed or closing

* Updated tests and connection testing

* PR review feedback updates

* PR review include ValueError in AnsibleError output

* Suggesting to use set_fact when using returned variable more than once.

* Cleaned up some tests, added some notes and handling connection closure on some exceptions.

* Removed finally statement and added some additional error handling.

* Added some additional error handling.

* PR review updates.

* Additional integration tests and removing return in finally

* Updated version

* Changing back to running tests on ubuntu.

* Additional tests

* Running tests on  Ubuntu only

* Fixing syntax error

* Fixing ingtegration tests and a string/byte issue

* Removed non-required test and fixed BOTMETA

* Trying to fix integration test failure on ubuntu1404

* Some issues occured when handling messages from the queue with to_native.  Switching to to_text resolved the issues.

* Renaming channel to queue (thanks dch). Disabling trusty tests.

.github/BOTMETA.yml

@@ -926,6 +926,9 @@ files:
     support: network
     maintainers: $team_networking
     labels: networking
+  lib/ansible/plugins/lookup/rabbitmq.py:
+    maintainers: Im0
+    support: community
   lib/ansible/plugins/netconf/sros.py:
     maintainers: wisotzky $team_networking
     labels: networking