rt: fix rt ticket creation for harvests

[ammirate]

This fix this issue: https://sentry.inspirehep.net/inspire-sentry/prod/issues/12/

Checklist:

• I have all the information that I need (if not, move to RFC and look for it).
• I linked the related issue(s) in the corresponding commit logs.
• I wrote good commit log messages.
• My code follows the code style of this project.
• I've added any new docs if API/utils methods were added.
• I have updated the existing documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[ammirate]

I have tested this manually on QA accepting records as core, and checking that tickets were created in inspirevm13.
Is there a way to test it locally?

[ammirate]

I have mocked the RT requests in the workflow tests, this should be enough for now.

[ammirate]

ci merge please