LMS-1835 Refactored Hdf5 code for better enforcement of the requirement to close files.

...e/java/ch/systemsx/cisd/etlserver/hdf5/Hdf5Container.java

...ch/systemsx/cisd/etlserver/hdf5/Hdf5StorageProcessor.java

...erver/hdf5/HierarchicalStructureDuplicatorFileToHdf5.java

...cisd/etlserver/hdf5/AbstractHdf5StorageProcessorTest.java

...sx/cisd/etlserver/hdf5/FileToHdf5DuplicationVerifier.java

...va/ch/systemsx/cisd/etlserver/hdf5/Hdf5ContainerTest.java

...r/hdf5/HierarchicalStructureDuplicatorFileToHdf5Test.java

...emsx/cisd/openbis/dss/etl/Hdf5BasedContentRepository.java

...systemsx/cisd/openbis/dss/etl/Hdf5ThumbnailGenerator.java

.../systemsx/cisd/openbis/dss/etl/PlateStorageProcessor.java