Add a unit test to make sure test classes are included in BVTs class list.

[jakeswenson]

its currently error prone having to maintain the suite classes.

@RunWith(Categories.class)
@Categories.IncludeCategory(BuildVerification.class)
@Categories.ExcludeCategory(VerySlowTests.class)
@Suite.SuiteClasses({
    StandardApiTests.class,
    MessageRepositoryTester.class,
    PopReceiptTester.class,
    QueueDeleterTests.class,
    ReaderTester.class,
    RepairTests.class,
    TimeTests.class,
    YamlConfigTest.class,
    QueueRepositoryTester.class,
    ApiAuthenticationTests.class
})
public class BuildVerificationTestSuite {
}

[jakeswenson]

Check out discussion here: junit-team/junit4#244