[maven-release-plugin] copy for tag dnet-openaire-data-protos-4.0.0-proto250
[maven-release-plugin] prepare release dnet-openaire-data-protos-4.0.0-proto250
bumped version
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release dnet-openaire-data-protos-3.7.7-proto250
depending on released parent
adapted to build as dnet45 snapshot
codebase used to migrate to java8 the production system