revise #727: avoid core progress use exception, use AlwaysFalseShardingValue instead of ShardingConditionAlwaysFalseException

Add test case for OptimizeEngine(添加OptimizeEngine的测试用例)

2、Add test case for generated key sharding(添加主键分片的测试用例)

Add OptimizeEngine class to optimize conditions(增加优化conditions相关类)

revise #728: Method getPacket of CommandResponsePackets use get(i) for LinkedList which is not permitted, use iterator to instead of it.

revise #728: Field databaseProtocolPackets of class can initialize directly, remove default constructor, and add @NoArgsConstructor annotation.

Rework for comments 8/10/14/15

1、Move function getShardingConditions from ParsingSQLRouter to OptimizeEngine(将getShardingConditions相关逻辑从ParsingSQLRouter移到OptimizeEngine)
2、Add some object Instead of null to return in OptimizeEngine(添加一些包装类代替返回值null)
3、Optimizing UnicastRoutingEngine no longer call CartesianRoutingEngine(优化UnicastRoutingEngine逻辑不在调用CartesianRoutingEngine)
4、Recover code with sharding by generated key condition(找回根据主键路由的部分代码)
5、Modify some code style(修改一些编码风格)

rework for comments No.3/4/5/7/9/12/13

junit test for $->{}