Selector parse EOF

[zhangyanc]

What is the purpose of the change

There are some minor errors in SelectorParser.jj, and it should work like ActiveMQ using javacc plugin

Brief changelog

• An incorrect import of LRUCache was deleted from SelectorParser.jj
• Add EOF token to match the end of selector sql, so selector like "a < 10bbbbb" will fail to parse, rather than parse out (a < 10)
• Changed the way quotes are compared so that there are no compile error with '\u005c' in generated SelectorParser.java
• add javacc plugin to automatically generate code, so we don't have to manual generate code with javacc command line when each time of .jj updated

Verifying this change

No Java code was modified and all the exist tests passed

[coveralls]

Coverage increased (+0.2%) to 43.258% when pulling d978b57 on zhangyanc:selector_parse_eof into b32668b on apache:master.

[ShannonDing]

close due to time too long and wrong to merge to master, welcome to create a new PR to the apache: develop branch.