dashboard:add Zookeeper flow rule publisher sample

[kexianjun]

Describe what this PR does / why we need it

add zookeeper flow rule publisher sample for dashboard

Does this pull request fix one issue?

Describe how you did it

Describe how to verify it

Special notes for reviews

[codecov-io]

Codecov Report

Merging #714 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #714      +/-   ##
============================================
- Coverage      40.4%   40.37%   -0.03%     
+ Complexity     1312     1311       -1     
============================================
  Files           297      297              
  Lines          8591     8591              
  Branches       1156     1156              
============================================
- Hits           3471     3469       -2     
- Misses         4695     4697       +2     
  Partials        425      425

Impacted Files	Coverage Δ	Complexity Δ
...m/alibaba/csp/sentinel/log/DateFileLogHandler.java	54.54% <0%> (-3.04%)	6% <0%> (-1%)

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[sczyh30]

LGTM

[sczyh30]

Thanks for contributing!