Files for building a docker container for rabbitmq

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New third-party repos

Enforce correct rabbit version installed

Flag rabbit upgrading

Adds the CHECK_RABBIT_VERSION flag (true by default). If true and the
rabbitmq version found differs from the version specified in
RABBITMQ_VERSION, the role fails. If false in the same scenario, the
role continues but does not install rabbitmq (because it's already
installed).

This enables us to continue using this role without forcing us to
upgrade rabbitmq.

Rebase miss

Missed merge conflict marker

syntax and whitespace

latest rabbit.