Changing RDS env vars to RAD_DB
Changing RDS env vars to RAD_DB

As suggested in
https://github.com/radremedy/radremedy/pull/172#issuecomment-75352570

radioprotector/radremedy,AllieDeford/radremedy,radremedy/radremedy,radremedy/radremedy,AllieDeford/radremedy,radioprotector/radremedy,radremedy/radremedy,radioprotector/radremedy,AllieDeford/radremedy,radioprotector/radremedy,radremedy/radremedy