fix YAMLLoadWarning

[PrivateRookie]

'atomic install/run'

Description

fix warning when thrown by yaml.load function, if load with default load, it will throw a deprecation warning. to fix it, try to import CLoader as Loader, if can't import CLoader, use Loader, and specify Loader when calling yaml.load

Pull Request Checklist:

If your Pull request contains new features or functions, tests are required. If the PR is a bug fix and no tests exist, please consider adding some to prevent regressions.

• [ ] Unittests
• [ ] Integration Tests

[rh-atomic-bot]

Can one of the admins verify this patch? I understand the following commands:

• bot, add author to whitelist
• bot, test pull request
• bot, test pull request once

[rhatdan]

LGTM