commit after refactoring
fix bug
pluging for collecting metadata from files mapped to urls (related to #3236)
using commons-lang3
small adjustments in rest json plugin
fixed 'next' method of the iterator class and added new field entityPath
implemented missing method collect in RestCollectorPlugin; added test class; removed RestIteratorFactory class
declaring bean for RestCollectorPlugin
collector plugin for rest apis
Moved HttpConnector in common package
Using HttpConnector in re3data plugin
integrated latest changes from dnet40
codebase used to migrate to java8 the production system