delete unused files, renaming

...enerator/src/main/java/kafkaSender/KafkaRecordSender.java

.../src/main/java/uc2/workloadGenerator/ConfigPublisher.java

.../main/java/uc2/workloadGenerator/ExperimentorBigData.java

...ator/src/main/java/uc2/workloadGenerator/LoadCounter.java

...or/src/main/java/uc2/workloadGenerator/LoadGenerator.java

.../main/java/uc2/workloadGenerator/LoadGeneratorExtrem.java