D-Net

#1315 propagating confidenceLevel to DocumentToConceptIds. Updating PIG transformer script by introducing concept identifiers deduplication UDF function picking record with the highest confidence level, introducing unit and integration tests. Propagating changes in document to concepts exporter module.

removing obsolete test resources

#1329 adding affiliations field in ExtractedDocumentMetadata PMC schema. Metadata extraction code refactoring by extracting code responsible for building Affiliation avro records to AffiliationBuilder class and sharing it with pmc ingestion. Implementing affiliations ingestion functionality in PmcXmlHandler covered with unit tests. Adding affiliations field support in ingest pmc metadata transformer.

#1306 introducing dummy field in DocumentId schema required to overcome https://issues.apache.org/jira/browse/PIG-3358 issue. Handling dummy filed in transformer pig scripts when it is required. Should be reverted as soon as PIG-3358 issue is fixed

#1312 wrapping tuple schema returned by outputSchema() method as described in PIG-3082

removing oozie-sharelib-distcp dependency from pom.xml file and relying on oozie.use.system.libpath=true set among job.properties

replacing icm-iis-3rdparty-pig-avrostorage dependency with original piggybank

merging trunk changes with IIS-CDH-5.3.0 branch

#1301 skipping transformation when input set to $UNDEFINED$ value

#1301 removing redundant schema parameter