merging trunk changes with IIS-CDH-5.3.0 branch
creating IIS-CDH-5.3.0 branch
#1169 fixing duplicate context issue, introducing integration test proving implemented solution works properly
#1133 dropping useless workfing_dir creation for java nodes
#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
#913 renaming DocumentContentUrl#contentSize to DocumentContentUrl#contentSizeKB changing field type from int to long, importing content size from ObjectStoreFile#fileSizeKB, updating dnet-objectstore-rmi dependency from 1.0.0 to 2.0.1-SNAPSHOT
#913 supplementing json files with newly introduced DocumentContentUrl#contentSize field value set to null
#840 moving IdentifierMapping from importer to common package
#840 renaming DeduplicationMapping to more generic IdentifierMapping
adding missing affiliation fields: countryCode, address, renaming country to countryName
#354 removing obsolete transformers/export/person transformer along with tests
#354 removing obsolete transformers/export/inferenced_document_without_imported_data transformer along with tests
#354 removing obsolete transformers/export/identifier/referenceddatasets transformer along with tests
#354 removing obsolete transformers/export/identifier/documents transformer along with tests
#354 removing obsolete transformers/export/document transformer along with tests
replacing redundant transformers/ingest/pmc/citations with already existing transformers/importer/documentmetadata/idextractor
adding missing "confidenceLevel" field