ITabularData moved to shared.utils in order to fix dependency failure

...s/dss/generic/server/AbstractTabularDataGraphServlet.java

...enbis/dss/generic/server/FileTabularDataGraphServlet.java

...is/dss/generic/server/graph/AbstractTabularDataGraph.java

...server/graph/TabularDataGraphCollectionConfiguration.java

.../openbis/dss/generic/server/graph/TabularDataHeatmap.java

...penbis/dss/generic/server/graph/TabularDataHistogram.java

...nbis/dss/generic/server/graph/TabularDataScatterplot.java

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

...x/cisd/openbis/dss/generic/shared/utils/ITabularData.java

...d/openbis/dss/generic/server/TabularDataGraphServlet.java