DatasetFileLines moved to shared.utils in order to fix broken dependency

.../plugins/standard/AbstractDataMergingReportingPlugin.java

...er/plugins/standard/AbstractFileTableReportingPlugin.java

...ver/plugins/standard/MergedColumnDataReportingPlugin.java

...server/plugins/standard/MergedRowDataReportingPlugin.java

...neric/server/plugins/standard/TSVViewReportingPlugin.java

...eric/server/plugins/tasks/IterativeTableModelBuilder.java

...openbis/dss/generic/shared/utils/CsvFileReaderHelper.java

...sd/openbis/dss/generic/shared/utils/DatasetFileLines.java

...lugins/standard/AbstractFileTableReportingPluginTest.java

.../server/plugins/tasks/IterativeTableModelBuilderTest.java

...enbis/dss/etl/featurevector/CsvFeatureVectorMigrator.java

...openbis/dss/etl/featurevector/CsvFeatureVectorParser.java

...is/dss/etl/featurevector/CsvToCanonicalFeatureVector.java

...ss/etl/featurevector/CsvToCanonicalFeatureVectorTest.java

...ss/generic/server/graph/AbstractTabularDataGraphTest.java