The docker-compose file starts an OBS instance (on 15.0 atm) and runs
the test suite in a test container (tumbleweed), so all tests run in
an isolated environment accessing OBS at api:3000
Previously, the user was changed, but the authentication not reset. For
osc.core calls made within the text context they would still run as Admin
while separate processes (like scripts) would run as the desired user. As
such this was not an issue before since only scripts were meant to run as
a different user.
