[SCB-2331] swagger generator support NotBlank and NotEmpty annotations

[fanjiwang1992]

Current swagger version is 1.6.2, this version do not recognize NotBlank and NotEmpty annotations. In some cases, it is misunderstand that some fields Using NotBlank and NotEmpty annotations are not equired.

[codecov-commenter]

Codecov Report

Merging #2554 (96d6a2a) into master (cda08df) will increase coverage by 0.01%.
The diff coverage is 90.47%.

@@             Coverage Diff              @@
##             master    #2554      +/-   ##
============================================
+ Coverage     77.63%   77.64%   +0.01%     
  Complexity     1420     1420              
============================================
  Files          1597     1597              
  Lines         42444    42464      +20     
  Branches       3575     3578       +3     
============================================
+ Hits          32951    32971      +20     
  Misses         7999     7999              
  Partials       1494     1494              

Impacted Files	Coverage Δ
...ger/generator/core/AbstractOperationGenerator.java	88.84% <90.00%> (+0.10%)	⬆️
...xrs/client/validation/ValidationServiceClient.java	75.60% <100.00%> (ø)
...ache/servicecomb/foundation/common/net/IpPort.java	86.66% <0.00%> (+3.33%)	⬆️
...r/springmvc/reference/CseHttpMessageConverter.java	64.70% <0.00%> (+5.88%)	⬆️

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