changing postgres password to text that does not include the username

With reference to [this StackOverflow question](http://stackoverflow.com/questions/26715449/how-to-install-postgres-using-chocolatey-nuget-when-i-receive-a-password-complex) the postgres password can't be used on default windows server 2008 R2 installs (and possibly other versions) because the password contains the username
Perhaps get to 12 characters with at least one number, one uppercase and one non-alpha char. This is a good start though to getting past issues.