Better validation when config.php does not exist
Update docs and quote password
only populate legacy vars in config_to_json
drop .travis.yml config copy
remove credentials from config.php.default
Check for existance of .env instead of config.php in python scripts
legacy credential cleanup
tiny cleanups
consistent env for artisan server and artisan dusk
DO NOT DELETE THIS TEXT
#### Please note
> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.
- [x] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)
#### Testers
If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`
After you are done testing, you can remove the changes with `./scripts/github-remove`. If there are schema changes, you can ask on discord how to revert.
