Revert "Drop sorting persons as it did not make a difference"

This reverts commit aba57c7.

Author: szarnyasg

src/main/java/ldbc/snb/datagen/LDBCDatagen.java

@@ -153,8 +153,13 @@ public int runGenerateJob(Configuration conf) throws Exception {
 
         printProgress("Serializing persons");
         long startPersonSerializing = System.currentTimeMillis();
-        HadoopPersonSerializer serializer = new HadoopPersonSerializer(conf);
-        serializer.run(hadoopPrefix + "/mergedPersons");
+        if (conf.getBoolean("ldbc.snb.datagen.serializer.persons.sort", true)) {
+            HadoopPersonSortAndSerializer serializer = new HadoopPersonSortAndSerializer(conf);
+            serializer.run(hadoopPrefix + "/mergedPersons");
+        } else {
+            HadoopDynamicPersonSerializer serializer = new HadoopDynamicPersonSerializer(conf);
+            serializer.run(hadoopPrefix + "/mergedPersons");
+        }
         long endPersonSerializing = System.currentTimeMillis();
 
         long startPersonActivity = System.currentTimeMillis();

src/main/java/ldbc/snb/datagen/util/ConfigParser.java

@@ -88,6 +88,7 @@ public static Configuration initialize() throws Exception {
         conf.set("ldbc.snb.datagen.generator.person.similarity", "ldbc.snb.datagen.entities.dynamic.person.similarity.GeoDistanceSimilarity");
         conf.set("ldbc.snb.datagen.parametergenerator.python", "python");
         conf.set("ldbc.snb.datagen.parametergenerator.parameters", "true");
+        conf.set("ldbc.snb.datagen.serializer.persons.sort", "true");
 
         /** Loading predefined Scale Factors **/