D-Net

#1147 introducing union4 pig script

#1133 dropping useless workfing_dir creation for java nodes

#1133 dropping useless workfing_dir creation for pig nodes

#118 introducing website usage community filter filtering out publication identifiers based on ids set retrieved from InformationSpace. This is required to exclude removed publications which were still present in logs.

#118 removing obsolete and duplicate transformer

updating job.properties

#919 renaming DocumentToResearchInitiative to DocumentToConceptId and DocumentToResearchInitiatives to DocumentToConceptIds

#1019 introducing integration test

#919 introducing integration test input and output

#919 introducing integration test containing empty input and output