SSDM-911 replace file operations manager in rsync archiver with a factory method

...rver/postregistration/SecondCopyPostRegistrationTask.java

...lugins/standard/IDataSetFileOperationsManagerFactory.java

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

...nbis/dss/generic/server/plugins/standard/TarArchiver.java

...nbis/dss/generic/server/plugins/standard/ZipArchiver.java

...ric/server/plugins/standard/AbstractArchiverTestCase.java

...ss/generic/server/plugins/standard/RsyncArchiverTest.java