Story #2859: Production environment passwords and configuration need to be secured
Change d1_cn_common's DAO layer to use configurable passwords
The DAO layer currently connects to the Metacat database in PostgreSQL using hard-coded usernames and passwords. The metacat-jdbc.properties file with these settings gets embedded into the jar file, and are unchangeable once deployed. Move this configuration to /etc/dataone/process in the buildout so that the username and password can be changed to the production username/password upon deployment.