LMS-2502 image transformations: server side + client URLs

...is/dss/generic/server/AbstractDatasetDownloadServlet.java

...emsx/cisd/openbis/dss/generic/shared/utils/ImageUtil.java

.../cisd/openbis/dss/generic/shared/utils/ImageUtilTest.java

...isd/openbis/dss/generic/shared/utils/ThumbnailTiming.java

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

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

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

...sx/cisd/openbis/dss/etl/ImagingDatabaseVersionHolder.java

...msx/cisd/openbis/dss/etl/dataaccess/IImagingQueryDAO.java

...cisd/openbis/dss/etl/dataaccess/ImagingDatasetLoader.java

...cisd/openbis/dss/etl/dto/ImageTransfomationFactories.java

...isd/openbis/dss/etl/dto/api/v1/SimpleImageDataConfig.java

...dto/api/v1/transformations/ImageTransformationBuffer.java

...dss/generic/server/ImageGenerationDescriptionFactory.java

...openbis/dss/generic/server/images/ImageChannelsUtils.java

...ric/server/images/dto/DatasetAcquiredImagesReference.java

...generic/server/images/dto/ImageGenerationDescription.java

.../generic/server/images/dto/ImageTransformationParams.java

...nbis/dss/generic/server/plugins/ColorRangeCalculator.java

...ugins/DynamixWellBrightnessEqualizerProcessingPlugin.java