set_as_super_user is a function param

[jredrejo]

Summary

mergeuser function have set_as_super_user as a param, it's not in the kwargs dict

References

Closes: 12486

Reviewer guidance

Follow steps in #12486 to check if merged user has superadmin capabilities

Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-.pex
Windows Installer (EXE)	kolibri-0.17.0b3.dev0+git.41.g6f358d90-windows-setup-unsigned.exe
Debian Package	kolibri_0.17.0b3.dev0+git.41.g6f358d90-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.17.0b3.dev0+git.41.g6f358d90.dmg
Android Package (APK)	kolibri-0.17.0b3.dev0+git.41.g6f358d90-0.1.3-debug.apk
TAR file	kolibri-0.17.0b3.dev0+git.41.g6f358d90.tar.gz
WHL file	kolibri-0.17.0b3.dev0+git.41.g6f358d90-py2.py3-none-any.whl

[rtibbles]

Code changes make sense, and the user seems to be properly migrated locally. Will defer to @radinamatic as to whether it fixes the issue overall, or whether we need to do additional work.

[rtibbles]

This doesn't fix the issue we were hoping it would, but is still an important fix, and have verified manually. Merging.