feat(hubble): warp the exception info in HugeClientUtil

[returnToInnocence]

…partial exceptions of hubble and server connection creation

Purpose of the PR

• fix #586

Main Changes

• constrain the message and cause returned by partial exceptions of hubble and server connection creation, By making the following changes
  • creat new class ExternalGenericException
  • add ExceptionHandler(ExternalGenericException & ConnectException)
  • Encapsulate the final e

Verifying these changes

• [ ] Trivial rework / code cleanup without any test coverage. (No Need)
• [ ] Already covered by existing tests, such as (please modify tests here).
• [x] Need tests and can be verified as follows:
  • All kinds of anomalies of /api/v1.2/graph-connections interface are tested

Does this PR potentially affect the following parts?

• [ ] Nope
• [ ] Dependencies (add/update license info)
• [ ] Modify configurations
• [ ] The public API
• [x] Other affects (typed here)
  • [x] add new ExceptionHandler

Documentation Status

• [ ] Doc - TODO
• [ ] Doc - Done
• [x] Doc - No Need

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 62.41%. Comparing base (b066b80) to head (692ba93). Report is 28 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #589 +/- ## ============================================ - Coverage 62.49% 62.41% -0.08% - Complexity 1903 1931 +28 ============================================ Files 262 267 +5 Lines 9541 9739 +198 Branches 886 891 +5 ============================================ + Hits 5963 6079 +116 - Misses 3190 3267 +77 - Partials 388 393 +5 ```

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