change group to space in some DTOs from API

.../java/ch/systemsx/cisd/etlserver/BDSStorageProcessor.java

.../systemsx/cisd/etlserver/DefaultDataSetInfoExtractor.java

...temsx/cisd/etlserver/cifex/CifexDataSetInfoExtractor.java

...ver/plugins/standard/AbstractDropboxProcessingPlugin.java

...sd/openbis/dss/generic/shared/dto/DataSetInformation.java

...a/ch/systemsx/cisd/etlserver/BDSStorageProcessorTest.java

...temsx/cisd/etlserver/DefaultDataSetInfoExtractorTest.java

...h/systemsx/cisd/etlserver/IdentifiedDataStrategyTest.java

...ystemsx/cisd/etlserver/TransferredDataSetHandlerTest.java

...basysbio/cisd/dss/PostRegistrationDatabaseUploadTask.java

...ch/systemsx/cisd/openbis/generic/server/CommonServer.java

...is/generic/server/business/bo/AbstractBusinessObject.java

...eric/server/business/bo/AbstractSampleBusinessObject.java

...cisd/openbis/generic/server/business/bo/ExperimentBO.java

...d/openbis/generic/server/business/bo/ExperimentTable.java

...sd/openbis/generic/server/business/bo/ExternalDataBO.java

...emsx/cisd/openbis/generic/server/business/bo/GroupBO.java

...sx/cisd/openbis/generic/server/business/bo/ProjectBO.java

...eneric/server/business/bo/SampleGenericBusinessRules.java

.../cisd/openbis/generic/server/business/bo/SampleTable.java