Add some tests to BowlingGame. Pending most difficult test joining spares strikes and normal frames.
Implement getScore method and BowlingGameTest happy case tests in green.
Improve implementation to work with spare semi perfect score
Fixed test to expect the correct score
Integrate BowlingGame with Bowling class and all our tests in GREEN.
Improve code style, javadoc and remove unused vars.
Add sonar support
Fix sonar issue.