tune ArJdbc scoped warnings/deprecations
handle pre JDBC 4 driver abstract method errors somehow gracefully
avoid throwing checked exceptions from JRuby methods
optimize config handling for a RubyHash instance
fix missing getConfig (while backporting from master)
[postgres] table_exists? fully compatible with Rails 4.1
[postgres] table_exists? AR 4.2 compatibility + 4.2 backported index_name_exists?