Add mock inject error code

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.04% :tada:

Comparison is base (1406c1b) 72.36% compared to head (49ad20a) 72.40%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 3.x #1241 +/- ## ============================================ + Coverage 72.36% 72.40% +0.04% - Complexity 1976 1980 +4 ============================================ Files 269 269 Lines 7812 7810 -2 Branches 996 996 ============================================ + Hits 5653 5655 +2 Misses 1649 1649 + Partials 510 506 -4 ``` | [Files Changed](https://app.codecov.io/gh/sofastack/sofa-boot/pull/1241?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sofastack) | Coverage Δ | | |---|---|---| | [...ck/injector/InjectorMockTestExecutionListener.java](https://app.codecov.io/gh/sofastack/sofa-boot/pull/1241?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sofastack#diff-c29mYS1ib290LXByb2plY3Qvc29mYS1ib290LWNvcmUvdGVzdC1zb2ZhLWJvb3Qvc3JjL21haW4vamF2YS9jb20vYWxpcGF5L3NvZmEvdGVzdC9tb2NrL2luamVjdG9yL0luamVjdG9yTW9ja1Rlc3RFeGVjdXRpb25MaXN0ZW5lci5qYXZh) | `88.63% <100.00%> (ø)` | | | [...t/mock/injector/resolver/BeanInjectorResolver.java](https://app.codecov.io/gh/sofastack/sofa-boot/pull/1241?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sofastack#diff-c29mYS1ib290LXByb2plY3Qvc29mYS1ib290LWNvcmUvdGVzdC1zb2ZhLWJvb3Qvc3JjL21haW4vamF2YS9jb20vYWxpcGF5L3NvZmEvdGVzdC9tb2NrL2luamVjdG9yL3Jlc29sdmVyL0JlYW5JbmplY3RvclJlc29sdmVyLmphdmE=) | `92.59% <100.00%> (-0.18%)` | :arrow_down: | | [.../test/mock/injector/resolver/BeanInjectorStub.java](https://app.codecov.io/gh/sofastack/sofa-boot/pull/1241?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sofastack#diff-c29mYS1ib290LXByb2plY3Qvc29mYS1ib290LWNvcmUvdGVzdC1zb2ZhLWJvb3Qvc3JjL21haW4vamF2YS9jb20vYWxpcGF5L3NvZmEvdGVzdC9tb2NrL2luamVjdG9yL3Jlc29sdmVyL0JlYW5JbmplY3RvclN0dWIuamF2YQ==) | `94.11% <100.00%> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/sofastack/sofa-boot/pull/1241/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sofastack)

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