Refactoring samples

Restructuring the samples repository
Add more docker support
Add acceptance tests for the apps
Adding sensor average processor sample
Remove aggregate samples

multi-io-samples/multi-io/README.adoc

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+Spring Cloud Stream Multi IO Sample
+====================================
+
+In this *Spring Cloud Stream* sample, the application shows how to configure multiple input/output channels inside a single application.
+
+## Requirements
+
+To run this sample, you will need to have installed:
+
+* Java 8 or Above
+
+This example requires Redis to be running on localhost.
+
+## Code Tour
+
+This sample is a Spring Boot application that bundles multiple application together to showcase how to configure multiple input/output channels.
+
+* MultipleIOChannelsApplication - the Spring Boot Main Application
+* SampleSource - the app that configures two output channels (output1 and output2).
+* SampleSink - the app that configures two input channels (input1 and input2).
+
+The channels output1 and input1 connect to the same destination (test1) on the broker (Kafka) and the channels output2 and
+input2 connect to the same destination (test2) on Kafka.
+For demo purpose, the apps `SampleSource` and `SampleSink` are bundled together.
+In practice they are separate applications unless bundled together by the `AggregateApplicationBuilder`.
+
+## Running the application
+
+The following instructions assume that you are running Kafka as a Docker image.
+
+* Go to the application root
+* `docker-compose up -d`
+
+* `./mvnw clean package`
+
+* `java -jar target/multi-io-0.0.1-SNAPSHOT.jar`
+
+The application will log messages from source and sink.
+Source sends a message every second which will be consumed by the sink.
+You will see output similar to the following every second.
+
+```
+******************
+From Source1
+******************
+Sending value: FromSource1
+******************
+From Source2
+******************
+Sending value: FromSource2
+******************
+At Sink2
+******************
+Received message FromSource2
+******************
+At Sink1
+******************
+Received message FromSource1
+```
+
+* `docker-compose down`
+
+## Running the application using Rabbit binder
+
+All the instructions above apply here also, but instead of running the default `docker-compose.yml`, use the command below to start a Rabbitmq cluser.
+
+* `docker-compose -f docker-compose-rabbit.yml up -d`
+
+* `./mvnw clean package -P rabbit-binder`
+
+* `java -jar target/multi-io-0.0.1-SNAPSHOT.jar`
+
+Once you are done testing: `docker-compose -f docker-compose-rabbit.yml down`
+
+