xUnit-style custom convention clears fixtures when preparing fixtures for the next test class.
Convert TypeBehaviorBuilderTests to ClassExecutionLifecycleTests in order to test at a higher, more meaningful level.
Migrate most of InstanceBehaviorBuilderTests over to ClassExecutionLifecycleTests, and rename ClassExecutionLifecycleTests to LifecycleTests.
Migrate most of CaseBehaviorBuilderTests over to LifecycleTests.