Fix duplication of chained notifications while reload config through api

[svagner]

Description

Fixes #2444

Type of change

From the following, please check the options that are relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How has this been tested?

The test is described in issue #2444

Checklist:

• [x] This contribution follows the project's code of conduct
• [x] This contribution follows the project's contributing guidelines
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules

[svagner]

I've tested locally and this looks good. Thanks very much @svagner

Thanks @tdinucci! I've changed the author of commit (due to the last check) and made force push. Could you please approve it again?:)

[svagner]

@tdinucci I see that merging is blocked for my account. Are you able to merge it to master branch?