Verify that all tests in ServerAssertion has been called - prevents false negatives

For Alpha1, if you don't install Phaser, and run the assertion from Phaser, it will pass all tests even though not all tests will be run.

It would be handy to verify that all tests has passed.

I suggest to add annotation, which will mark lifecycle event annotations like @BeforePhase and runtime will need to verify all the assertion methods were ran.