offer cluster deployment by ansible

[silentsai]

trafficstars

• this PR offer cluster deployment before benchmark through ansible operations

@siddontang PTAL

[siddontang]

any update?

[silentsai]

@siddontang PTAL again ~

• presist jobs' data via sqlite
• confirm index field of job bench result

[silentsai]

@jomenxiao @cwen0 PTAL

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