Fix tests race conditions

Change-Id: I964c4497248c1d720d1b984a83f78d59e8fdb88f
EventHandler: Do not set sendEvent method as const

Change-Id: I2b31dd187ef0a3cf5fae71d0f61b57273ed0f15b
MediaSet: Separate subscriptionId from handlerId

Change-Id: I5f9e72be6314109a5a5af7159ccaf618f2a8ebd9
MediaSet: Improve management of handlers live cycle

Now handlers are unreferenced when an object is unreferenced

Change-Id: I7e47dbc69f0ecba4a99dfeecfa42bd25f577c16a
RabbitMQConnection: Offer address and port getters

Change-Id: I8b009af3aaca7d67035811df5e5199cf147c7f99
RabbitMQPipeline: Fix log tag

Change-Id: I22f9bd6bbdcba8a90206d916d50ae8d32a2e7872
RabbitMQPipeline: Fix identation

Change-Id: I67d416cc46450dcd039475feb320479be14f2c87
RabbitMQPipeline: Store pipelineId

Change-Id: I68a8aac77ef334a76c873de87b06f66d6e9c77d6
RabbitMQ: Implement EventHandler

Change-Id: I44bbd58d9039c9b38ab77ebbd7181aaf9c1677aa