[maven-release-plugin] copy for tag dnet-openaire-data-protos-3.9.1-proto250
added result specific fields to align with the guidelines
bumped version, added author pids and affiliation strings
bumped version, added DataInfo.invisible field
introduced journal detail fields, introduced field accessright(OPEN|CLOSED|...) and changed type for license
integrated changes from trunk
introducing software entities, yay
reverting to r47996 , before the Software entities introduction
added fields collectedfrom and dateofacceptance to the instance type
fixed version name
codebase used to migrate to java8 the production system