Fix Pipeline 2335367

What does this MR do and why?

Fix pipeline: https://jihulab.com/gitlab-cn/gitlab/-/pipelines/2335367

1. Rename "BLANK_SHA" to "SHA1_BLANK_SHA"

Failed job: https://jihulab.com/gitlab-cn/gitlab/-/jobs/12032424

Related Upstream MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/140394

2. 删除测试用例 notify_spec.rb:94

Failed job: https://jihulab.com/gitlab-cn/gitlab/-/jobs/12032425

Related Upstream MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139296

Upstream 把文案改了，中文翻译还没跟上，所以 JiHu Spec 报错。这里不需要验证中文文案，直接删掉此 Spec 就完事了。

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另外，修复一些 Rubocop 的错误。

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