SSDM-4591 : Re-organize OpenbisSync related classes to make it easier for build scripts

...neric/server/dss/plugins/sync/common/EntityRetriever.java

...ic/server/dss/plugins/sync/common/ServiceFinderUtils.java

...s/plugins/sync/datasource/ResourceSyncRequestHandler.java

.../dss/plugins/sync/harvester/HarvesterMaintenanceTask.java

...s/plugins/sync/harvester/config/BasicAuthCredentials.java

...erver/dss/plugins/sync/harvester/config/ConfigReader.java

.../server/dss/plugins/sync/harvester/config/SyncConfig.java

...ns/sync/harvester/config/SynchronizationConfigReader.java

...dss/plugins/sync/harvester/synchronizer/DSSFileUtils.java

...ter/synchronizer/DataSetRegistrationIngestionService.java

...ugins/sync/harvester/synchronizer/EntitySynchronizer.java

...plugins/sync/harvester/synchronizer/MasterDataParser.java

...ugins/sync/harvester/synchronizer/ResourceListParser.java

...s/sync/harvester/synchronizer/ResourceListParserData.java

...synchronizer/datasourceconnector/DataSourceConnector.java

...ynchronizer/datasourceconnector/IDataSourceConnector.java

...rvester/synchronizer/translator/CustomNameTranslator.java

...vester/synchronizer/translator/DefaultNameTranslator.java

...nc/harvester/synchronizer/translator/INameTranslator.java

...er/synchronizer/translator/PrefixBasedNameTranslator.java