add Initialize, timeTicker

[sxci]

变更背景描述

添加参数控制 fusion 刷新、预取频率，每次提交条数；---- --qps 1 -s 50
预先判断是否 debug 模式，打印不同信息； --- OnInitialize

jira issue链接

主要变更点

• [*]fix bug
• []new feature
• []不兼容变更

Checklist

• [*] 已自测
• [] 已更新Readme

qps 限制参数放到每个具体的指令里，还是放到 cobra RootCmd.PersistentFlags() 里？

[codecov]

Codecov Report

Merging #279 into master will increase coverage by 0.08%.
The diff coverage is 23.33%.

@@            Coverage Diff            @@
##           master    #279      +/-   ##
=========================================
+ Coverage    6.67%   6.76%   +0.08%     
=========================================
  Files          40      40              
  Lines        4851    4876      +25     
=========================================
+ Hits          324     330       +6     
- Misses       4522    4540      +18     
- Partials        5       6       +1     

Impacted Files	Coverage Δ
cmd/cdn.go	9.09% <20.83%> (+3.53%)	⬆️
cmd/root.go	16.39% <33.33%> (+0.32%)	⬆️

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[bachue]

/lgtm

[qiniu-bot]

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