Add tests to improve coverage of NoSnakeLadderLoopValidator

[hitanshu310]

Currently at 90 percent can we get it to 100%

[Shubh-Shah-27]

Instead Of the NoSnakeLadderLoopValidator, can we simply do this :

Checking start and end positons only

public class NoSnakeLadderLoopValidatorTry extends IValidate{
@OverRide
public boolean validate(Connector connector, HashMap<Integer, Connector> snakes, HashMap<Integer, Connector> ladders) {

    int end = connector.getEnd();
    if (connector.getConnectorType() == ConnectorType.LADDER) {
        if (snakes.containsKey(end)) {
            if(connector.getStart() == snakes.get(end).getEnd())
                return false;
        }
    } else if (connector.getConnectorType() == ConnectorType.SNAKE) {
        if (ladders.containsKey(end)) {
            if(connector.getStart() == ladders.get(end).getEnd())
            return false;
        }
    }
    return true;
}

}