Use Titan CC Avro Records in UC App and Workload Generator

Integrates merge requests !6 (merged) and !13 (closed).

Implements #1 (closed), #10 (closed), #16 (closed), #18 (closed), and #34 (closed).

uc2-application/src/main/java/theodolite/uc2/application/AggregationService.java

@@ -5,7 +5,7 @@ import java.util.concurrent.CompletableFuture;
 import org.apache.commons.configuration2.Configuration;
 import org.apache.kafka.streams.KafkaStreams;
 import theodolite.uc2.streamprocessing.Uc2KafkaStreamsBuilder;
-import titan.ccp.common.configuration.Configurations;
+import titan.ccp.common.configuration.ServiceConfigurations;
 
 /**
  * A microservice that manages the history and, therefore, stores and aggregates incoming
@@ -14,7 +14,7 @@ import titan.ccp.common.configuration.Configurations;
  */
 public class AggregationService {
 
-  private final Configuration config = Configurations.create();
+  private final Configuration config = ServiceConfigurations.createWithDefaults();
 
   private final CompletableFuture<Void> stopEvent = new CompletableFuture<>();
 
@@ -47,6 +47,7 @@ public class AggregationService {
     // Configuration of the stream application
     final KafkaStreams kafkaStreams = uc2KafkaStreamsBuilder
         .bootstrapServers(this.config.getString(ConfigurationKeys.KAFKA_BOOTSTRAP_SERVERS))
+        .schemaRegistry(this.config.getString(ConfigurationKeys.SCHEMA_REGISTRY_URL))
         .numThreads(this.config.getInt(ConfigurationKeys.NUM_THREADS))
         .commitIntervalMs(this.config.getInt(ConfigurationKeys.COMMIT_INTERVAL_MS))
         .cacheMaxBytesBuffering(this.config.getInt(ConfigurationKeys.CACHE_MAX_BYTES_BUFFERING))