enabled pretty print for specs printing via gson

src/main/java/de/uulm/omi/evaluation/task/EvaluationTask.java

 package de.uulm.omi.evaluation.task;
 
 import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import de.uulm.omi.cloudiator.dbms.evaluator.model.EvaluationContext;
 import de.uulm.omi.utils.EntrypointProperties;
 import java.io.IOException;
@@ -41,7 +42,7 @@ public abstract class EvaluationTask implements Work, ReportService {
   public static final String TIMESERIES_FOLDER = "timeseries";
   public static final String TASK_LOG_FOLDER = "taskLogs";
 
-  public static final Gson GSON = new Gson();
+  public static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
 
   protected final EvaluationContext evaluationContext;
   protected final TaskType taskType;

src/main/java/de/uulm/omi/evaluation/task/YcsbWorkload.java

@@ -156,13 +156,11 @@ public class YcsbWorkload extends EvaluationTask {
 
   private void writeWorkloadSpec(int instanceCounter, String workloadSpecName){
 
-    String ycsbJSON = GSON.toJson(ycsbWorkload);
-
     //Write Spec to disk
-    LOGGER.debug(loggerPrefix + "Running Workload Spec: " + ycsbJSON);
+    LOGGER.debug(loggerPrefix + "Running Workload Spec: " + ycsbWorkload.toString());
     String specUri = this.evaluationContext.getEvluationRun() +   File.separator + EvaluationTask.SPECS_FOLDER
         + File.separator + instanceCounter + "_" + workloadSpecName;
-    this.writeReport(specUri, ycsbJSON);
+    this.writeReport(specUri, GSON.toJson(ycsbWorkload));
   }