Allow DB URI to be set via ENV
Fix cryptic errors when tests_json_path is missing ref_config
Merge pull request #116 from Medium/nick-missing-config

Fix cryptic errors when tests_json_path is missing ref_config
If a URL fails to decode, keep going
Merge pull request #106 from dnadesign/feature/configure_db_env

Allow DB URI to be set via ENV
Merge pull request #115 from Medium/nick-decode

If a URL fails to decode, keep going