Add rabbitmq dependency

[Gsantomaggio]

• Add rabbit dependency, so it is possible to execute:make run-broker
• Change git branch to stable ( we should always stable as reference, and not a specific version)
• Change random function ( note for 3.6.x we should not use random, ssl and time functions directly but use the compatmodules: rand_compat ,ssl_compact, time_compact )

[Ayanda-D]

NOTE: These changes won't work when the plugin is built from master. rand_compat ,ssl_compact and time_compact are only implemented in rabbitmq-common stable branch, and not master, hence testing this results in modules not being found/undef errors. Plugin now also requires a new branch stable to be built from, which I've just created, for the build to also make correct reference to the stable branch of required deps 👍

[Gsantomaggio]

yep! if we want to follow the RAbbitMQ standards, we should create stable branch for 3.6.x and master for 3.7.x.

Just to clarify:
The master does not need the *_compat modules because of rabbitmq/rabbitmq-server#546

The 3.6.x versions need *_compat modules because have to support old Erlang versions https://www.rabbitmq.com/which-erlang.html

[Ayanda-D]

Initial implementation was to work from master while avoiding these strict dependencies introduced by rabbitmq-components.mk. We're currently emphasising on 3.6.x compatibility most importantly, hence this had to be quickly corrected. Working on 3.7.x compatibility in parallel.

NOTE: I've released a robust and system-ready 0.2 release bearing these dependency changes and aspects in mind. Leaving it on 0.2 for a while we further enhance 👍