Base class for all database based integration tests.
Fixes creation of `DocumentSet` with CouchDB.
Updating the `CrudTest` integration test.
Updating the `DatabaseTest` integration test.
Updating the `DocumentTest` integration test.
Remove all database specific sql files.
Removing `Companies` & `Galleries` models.
Update the `FieldTest` integration test.
Updating the `SourceTest` integration test.
Refactor & move database's `ResultTest` to integration tests.
Refactor & move database adapter `MySqlTest` to integration tests.
Refactor & move database adapter `PostgreSqlTest` to integration tests.
Refactor & move database adapter `Sqlite3Test` to integration tests.
CI process now require `li3_fixtures` to run some integration tests.
Update database adapter Mock file.
Add database adapter test for schema feature in independant files.