refactor gray release open api a little bit

[nobodyiam]

No description provided.

[codecov-io]

Codecov Report

Merging #1533 into master will decrease coverage by 0.02%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #1533      +/-   ##
============================================
- Coverage     48.67%   48.65%   -0.03%     
+ Complexity     1896     1895       -1     
============================================
  Files           393      393              
  Lines         11484    11485       +1     
  Branches       1188     1192       +4     
============================================
- Hits           5590     5588       -2     
- Misses         5466     5468       +2     
- Partials        428      429       +1

Impacted Files	Coverage Δ	Complexity Δ
...enapi/v1/controller/NamespaceBranchController.java	2.7% <0%> (-1.47%)	1 <0> (ø)
...ramework/apollo/openapi/util/OpenApiBeanUtils.java	0% <0%> (ø)	0 <0> (ø)	⬇️
.../apollo/internals/RemoteConfigLongPollService.java	76.68% <0%> (-1.23%)	27% <0%> (-1%)

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[coveralls]

Coverage decreased (-0.01%) to 52.39% when pulling 3481843 on nobodyiam:open-api-gray-release-refactor into 9bb54dd on ctripcorp:master.