* fix(config/apollo): support multiple namespace
* fix(config/apollo): modify example and test
* fix(config/apollo): recoding watcher
* styl(config/apollo): package sort; use log instead of fmt
* styl(config/apollo): use kratos/log package instead of fmt
* styl(config/apollo): optimise code with reviewer advises; fix some edge cases on genKey function.
* styl(config/apollo): rename `convertProperties` as `resolve`