Make use of useDatabase annotation

[emteknetnz]

SapphireTest can utilize a @useDatabase false annotation to not reset the database when there's a unit test method inside of test class that does use the database, either because $usesDatabase = true, or because a yml fixture file is being used. This saves a little running time.

Acceptance criteria

• [ ] Create a code writer to identify unit test classes that use the database, and test methods inside those classes that don't use the database
• [ ] Add the @useDatabase false annotation to those methods

[GuySartorelli]

You can also set protected $usesDatabase = false; in a class to explicitly not use database for any tests in that class, which is probably preferable to annotating all the methods in that class.