fixing connection closed errors with updated postgresql driver
experimenting with BasicDatasource(s) from commons-dbcp2
removed dependency commons-dbcp2
avoid to use jdbcTemplate as it tries to load the entire resultset in memory
set fetchSize in each jdbcTemplate instance
using apache commons dbcp2 instead of spring default DataSource
adopted java8 syntax
reverted to r46768
added openaire specific behaviour: do not update the datasource related information when the datasource is managed
removed table logging bloatware
migrated to dnet45, using updated mockito version
codebase used to migrate to java8 the production system