bump up versions of apache commons-{codec, lang}
update postgresql jdbc driver to 9.3
Refactor: avoid deprecated ObjectUtils calls
Merge pull request #267 from dbfit/bump-up-commons-codec-and-lang-versions

bump up versions of apache commons codec and lang
Merge pull request #268 from dbfit/bump-up-postgresql-jdbc-to-9.3

Update PostgreSQL JDBC driver to 9.3
Merge pull request #270 from dbfit/reorg-deprecated-objectutils-calls

Remove usage of deprecated commons.lang3.ObjectUtils methods
testvm: bump up jdk to 8
bump up travis java to oraclejdk8
update build compatibility level to 8