Templatize conf.properties file

[cecilia-donnelly]

Currently, source/tests/functional/NYCAutomationTest/src/test/resources/conf.properties has build-specific properties checked in. This file should be replaced with conf.properties.tmpl, which has placeholders for connection details. Each developer would then copy conf.properties.tmpl to an unversioned file named conf.properties and fill this file with appropriate values for their local set up. This will help prevent checking in credentials that should be kept private.

Once the conf.properties.tmpl file is created, conf.properties can be added to .gitignore, so that this private file is never accidentally checked in.

I mentioned this in PR #69, but decoupling the tests from a database connection is probably a slightly separate problem.