Reverse include_password defaults for dbconsole

Unfortunately there's no way to configure it. I'll think about some nice way to introduce it (maybe something like `config.console.dbconsole.include_password =` in application.rb?) and send PR for upstream rails. 

Meanwhile if we want to have `-p` by default, we need to use this hack :see_no_evil: 

@square/railsfork-contributors