Refactor hazelcast jet benchmarks:

Refactors the hazelcast implementations according to #374 (closed) in order to add integration tests: Changes:

• Add HazelcastJetService for commons
• Add PipelineFactory for commons
• Add UcXPipelineFactoies for all usecases
• Add NewHistoryService for stepwise migration

theodolite-benchmarks/hazelcastjet-commons/src/main/java/rocks/theodolite/benchmarks/commons/hazelcastjet/HazelcastJetService.java

@@ -8,6 +8,11 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import titan.ccp.common.configuration.ServiceConfigurations;
 
+/**
+ * Abstract HazelcastJetService.
+ * Holds common fields and logic shared for all hazelcast jet services.
+ * Set common settings and initiates a hazelcast jet instance.
+ */
 public abstract class HazelcastJetService {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(HazelcastJetService.class);