remove some characters there are not in XML Character Range.see https://www.w3.org/TR/REC-xml/#charsets
javadoc and some java8 stuff
do not pollute the logs
Moved HttpConnector in common package
update user-agent to "Mozilla/5.0 (compatible; OAI; +http://www.openaire.eu)", the word "Harvester" caused 403 status code in one case
codebase used to migrate to java8 the production system