Introduce Gradle convention plugins

Implements #107 (closed)

Depends on !90 (merged).

theodolite-benchmarks/docker-test/uc1-flink-docker-compose/docker-compose.yml

+version: '2'
+services:
+  zookeeper:
+    image: confluentinc/cp-zookeeper
+    expose:
+      - "9092"
+    environment:
+      ZOOKEEPER_CLIENT_PORT: 2181
+  kafka:
+    image: wurstmeister/kafka
+    expose:
+      - "9092"
+    #ports:
+    #  - 19092:19092
+    environment:
+      KAFKA_LISTENERS: PLAINTEXT://:9092,CONNECTIONS_FROM_HOST://:19092
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,CONNECTIONS_FROM_HOST://localhost:19092
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,CONNECTIONS_FROM_HOST:PLAINTEXT
+      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
+      KAFKA_ZOOKEEPER_CONNECTION_TIMEOUT_MS: 30000
+      KAFKA_CREATE_TOPICS: "input:3:1,output:3:1,configuration:3:1,aggregation-feedback:3:1"
+  schema-registry:
+    image: confluentinc/cp-schema-registry:5.3.1
+    depends_on:
+      - zookeeper
+      - kafka
+    expose:
+      - "8081"
+    #ports:
+    #  - 8081:8081
+    environment:
+      SCHEMA_REGISTRY_HOST_NAME: schema-registry
+      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: 'zookeeper:2181'
+  load-generator: 
+    image: ghcr.io/cau-se/theodolite-uc1-workload-generator:latest
+    depends_on:
+      - schema-registry
+      - kafka
+    environment:
+      BOOTSTRAP_SERVER: uc-wg:5701
+      PORT: 5701
+      KAFKA_BOOTSTRAP_SERVERS: kafka:9092
+      SCHEMA_REGISTRY_URL: http://schema-registry:8081
+      NUM_SENSORS: 10
+  benchmark-jobmanager:
+    image: ghcr.io/cau-se/theodolite-uc1-flink:latest
+    ports:
+      - "8080:8081"
+    command: standalone-job --job-classname theodolite.uc1.application.HistoryServiceFlinkJob
+    environment:
+      - KAFKA_BOOTSTRAP_SERVERS=kafka:9092
+      - SCHEMA_REGISTRY_URL=http://schema-registry:8081
+      - |
+        FLINK_PROPERTIES=
+        jobmanager.rpc.address: benchmark-jobmanager
+        parallelism.default: 1
+    depends_on:
+      - schema-registry
+      - kafka
+  benchmark-taskmanager:
+    image: ghcr.io/cau-se/theodolite-uc1-flink:latest
+    command: taskmanager
+    environment:
+      - |
+        FLINK_PROPERTIES=
+        jobmanager.rpc.address: benchmark-jobmanager
+    depends_on:
+      - schema-registry
+      - kafka