Fix SSRF, resolve #2103

* Try to support JDK 8+

simplify k8s deployment

修复因为Dockerfile中ENTRYPOINT导致运行容器read-only报错
修复多个环境使用同dev环境注册中心导致web管理界面获取admin Server不一致

fix conflict logical in properties config.

support setting app id from OS environment variable APP_ID

Add OpenAPI to get application information

modified spring security user update and delete sql by use primary key  for support database set SQL_SAFE_UPDATES = 1 #1997 (#2016)

* bugfix: line feed under Windows. resolve issue #2015

feature: diff configurations among clusters. issue #1966

优化网卡地址优先级，index低的网卡地址优先级高

* replace some guava API with new Java 1.7 native API
* replace Collections.sort with List.sort(Java 1.7)
* replace annonymous inner types with lambdas
* use try-with-resources where possible
* replace explicit types with diamond operators

fix bug (when use reverse proxy with TLS, "HttpServletResponse.sendRedirect" will redirect to http rather than https)

fix bug (when use reverse proxy with TLS, "HttpServletResponse.sendRedirect" will redirect to http rather than https)

1. fix flyway migration Chinese garbled issue
2. limit hibernate query plan cache
3. fix import/export api
4. wording update for yaml/yml namespace support
5. update ldap sample configurations