fix(#156): unit test fixture not found when integrating with cht-sync

[lorerod]

Description

I'm renaming /test folder to /tests to use the default dbt test path. And adding /tests/init.sql to .dbtignore

medic/cht-pipeline#156

Code review checklist

• [ ] Readable: Concise, well named, follows the style guide, documented if necessary.
• [ ] Documented: Configuration and user documentation on cht-docs
• [ ] Tested: Unit and/or e2e where appropriate
• [ ] Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[medic-ci]

:tada: This PR is included in version 1.1.1 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: