changed implementation of CommunityConfiguration to add the zenodo community associated to the openAIRE communiti to the list of the Zenodo communities. Updated also the test
merged changes from trunk -r53811:HEAD
branch for solr 7.5.0
testing for communityconfigurationfactory
more vtd utilities
added integration test for VTD parser, reads the datacite collection and provide statistics about the parser performances
VTD based publication and dataset parser
more VTD utilities
added more VTDUtilities
More VTD Utilities
introducing VTD parser utilities
depending on protobuf specific version, getting rid of person entities, updated solrj version
java8 all the way
integrated latest changes from dnet40
codebase used to migrate to java8 the production system