Refactoring samples

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

source-samples/jdbc-source/src/main/resources/application.yml

@@ -0,0 +1,11 @@
+spring:
+  datasource:
+    url: jdbc:mariadb://localhost:3306/sample_mysql_db
+    username: root
+    password: pwd
+    driver-class-name: org.mariadb.jdbc.Driver
+jdbc:
+  query: select id, name, tag from test order by id
+  triggerDelay: 5
+spring.cloud.stream.bindings.output.destination: test-data
+spring.cloud.stream.bindings.input.destination: test-data