D-Net

change insert-queries to ignore null values, change the date format in claim insert query, add enrich result methods, add bean for claimOperations class, export report files for not found projects/results, invalid dois and enriched results from dmfs

Refactoring the packages, a class QueryOperations is added, organizing the TestClass

Change/add fields for openaire entities, create/update methods for queries which create tables, insert claim relations , etc

support to bulk load jsonLd claims

jsonLD is now created correctly
support to send the jsonld via post request to annotation service (inside jsonLdBuilder)

Use class claimGenerics in ParsingClaimUtils and Test

complete the commit (r40086)/adding the rest files - Adding the initial methods for parsing dmf claims, require necessary fields from search, build the complete the sructure of a complete claim

initial support to convert claim Object to jsonldString