modify schema response bug fix

[aseTo2016]

No description provided.

[codecov-io]

Codecov Report

Merging #212 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #212      +/-   ##
==========================================
+ Coverage   67.96%   67.99%   +0.02%     
==========================================
  Files          17       17              
  Lines        3584     3584              
==========================================
+ Hits         2436     2437       +1     
  Misses        974      974              
+ Partials      174      173       -1

Impacted Files	Coverage Δ
server/service/schema.go	73.04% <100%> (ø)	⬆️
server/service/tag.go	74.41% <0%> (+0.58%)	⬆️

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[coveralls]

Coverage increased (+0.2%) to 71.738% when pulling 3ee334f on aseTo2016:aseTo2016 into c671101 on ServiceComb:master.