Fix how the Postgres connector could only practically connect to localhost

[crccheck]

Tis ont erpefct, but now fake2db actually works for me now.

I tried to make this a minimal change, but there were some things I could not overlook, so there's some extra changes not related to the ability to pass in username/password.

Tested locally with:

$ fake2db --db postgresql --rows 1337 --host elk_postgres.local --password password --user docker
2015-09-02 17:19:25,854 crccheck      Rows argument : 1337
2015-09-02 17:19:36,184 crccheck      Database created and opened succesfully: postgresql_vsgjqwju
2015-09-02 17:19:38,134 crccheck      simple_registration Commits are successful after write job!
2015-09-02 17:19:39,864 crccheck      detailed_registration Commits are successful after write job!
2015-09-02 17:19:41,488 crccheck      companies Commits are successful after write job!
2015-09-02 17:19:42,958 crccheck      user_agent Commits are successful after write job!
2015-09-02 17:19:45,376 crccheck      customer Commits are successful after write job!

[emirozer]

Thank you very much for your contribution 👍
The whitespace thing is kind of weird.. what do you use for formatting?
I run my python code through https://github.com/google/yapf

[crccheck]

I use sublime text and vim. For my style, I have an .editorconfig at my root with trim_trailing_whitespace: true

Before .editorconfig, I set it individually for my editors, but with this, I can set my style per project and editor agnostic.

http://editorconfig.org/