portage: use unversioned zentoo profile
linux: create /etc/local.d on gentoo
java: always use the latest JDK
mysql: use emerge --config instead of custom script
postgresql: do not set postgres password
zookeeper: cleanup recipe
druid: cleanup recipes a bit
add base role for good measure
make generate:cookbook generate more folders and run_state
fix typo in run state helpers
java: add log4j helper