[LMS-2087] Eager archiving (part 6 - initial implementation for deleteFromArchive)

...AbstractDataSetDeletionPostProcessingMaintenanceTask.java

...d/etlserver/plugins/DeleteFromArchiveMaintenanceTask.java

...tlserver/plugins/DeleteFromExternalDBMaintenanceTask.java

...msx/cisd/openbis/dss/generic/server/DataStoreService.java

...penbis/dss/generic/server/EncapsulatedOpenBISService.java

.../server/openbisauth/OpenBISAuthenticationInterceptor.java

...openbis/dss/generic/server/plugins/demo/DemoArchiver.java

...er/plugins/standard/AbstractArchiverProcessingPlugin.java

...is/dss/generic/server/plugins/standard/RsyncArchiver.java

...s/generic/server/plugins/standard/RsyncDataSetCopier.java

...bis/dss/generic/server/plugins/tasks/IArchiverPlugin.java

...dss/generic/server/plugins/tasks/PluginTaskProviders.java

...enbis/dss/generic/shared/IEncapsulatedOpenBISService.java

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

...a/ch/systemsx/cisd/openbis/generic/server/ETLService.java

...ystemsx/cisd/openbis/generic/server/ETLServiceLogger.java

...openbis/generic/server/business/bo/ExternalDataTable.java

...msx/cisd/openbis/generic/server/dataaccess/IEventDAO.java

...x/cisd/openbis/generic/server/dataaccess/db/EventDAO.java

...systemsx/cisd/openbis/generic/shared/IETLLIMSService.java