ws: Fix test-auth to ignore another warning in bad command test
ws: Fix test-auth to ignore another warning in bad command test

The "bad command" test can produce all sorts of warnings because
it uses multiple processes. So lets add another one we're seeing
here:

cockpit-ws-WARNING **: bad-command: Auth pipe closed: not-found
**
cockpit-protocol:ERROR:src/ws/test-auth.c:533:test_bad_command: Got unexpected message: bad-command: Auth pipe closed: not-found instead of cockpit-protocol-Message: *couldn't write: Connection refused*
./test-auth terminated with SIGABRT
FAIL: test-auth 37 /auth/bad-command

Closes #5385
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

stefwalter/cockpit,xhad/cockpit,xhad/cockpit,xhad/cockpit,arilivigni/cockpit,petervo/cockpit,harishanand95/cockpit,andreasn/cockpit,cockpituous/cockpit,mareklibra/cockpit,dperpeet/cockpit,stefwalter/cockpit,xhad/cockpit,dperpeet/cockpit,arilivigni/cockpit,stefwalter/cockpit,stefwalter/cockpit,larskarlitski/cockpit,Scribery/cockpit,petervo/cockpit,dperpeet/cockpit,martinpitt/cockpit,mvollmer/cockpit,martinpitt/cockpit,stefwalter/cockpit,mvollmer/cockpit,vanloswang/cockpit,xhad/cockpit,moraleslazaro/cockpit,harishanand95/cockpit,cockpituous/cockpit,stefwalter/cockpit,moraleslazaro/cockpit,petervo/cockpit,moraleslazaro/cockpit,andreasn/cockpit,arilivigni/cockpit,petervo/cockpit,garrett/cockpit,sgallagher/cockpit,moraleslazaro/cockpit,petervo/cockpit,SotolitoLabs/cockpit,larsu/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,larskarlitski/cockpit,sgallagher/cockpit,cockpit-project/cockpit,martinpitt/cockpit,deryni/cockpit,sgallagher/cockpit,michalskrivanek/cockpit,Scribery/cockpit,michalskrivanek/cockpit,dperpeet/cockpit,michalskrivanek/cockpit,andreasn/cockpit,moraleslazaro/cockpit,arilivigni/cockpit,garrett/cockpit,Scribery/cockpit,mareklibra/cockpit,xhad/cockpit,andreasn/cockpit,michalskrivanek/cockpit,vanloswang/cockpit,larskarlitski/cockpit,vanloswang/cockpit,andreasn/cockpit,larskarlitski/cockpit,petervo/cockpit,garrett/cockpit,larsu/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,arilivigni/cockpit,vanloswang/cockpit,harishanand95/cockpit,deryni/cockpit,larskarlitski/cockpit,larsu/cockpit,larsu/cockpit,sgallagher/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,cockpit-project/cockpit,sgallagher/cockpit,arilivigni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpituous/cockpit,garrett/cockpit,larskarlitski/cockpit,deryni/cockpit,dperpeet/cockpit,mareklibra/cockpit,Scribery/cockpit,deryni/cockpit,harishanand95/cockpit,harishanand95/cockpit,mvollmer/cockpit,dperpeet/cockpit,andreasn/cockpit,sgallagher/cockpit,michalskrivanek/cockpit,Scribery/cockpit,larsu/cockpit,michalskrivanek/cockpit,mareklibra/cockpit,vanloswang/cockpit,cockpituous/cockpit,arilivigni/cockpit,dperpeet/cockpit,Scribery/cockpit,vanloswang/cockpit,larskarlitski/cockpit,michalskrivanek/cockpit,mvollmer/cockpit,mvollmer/cockpit,cockpituous/cockpit,larsu/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,deryni/cockpit,petervo/cockpit,SotolitoLabs/cockpit,xhad/cockpit,andreasn/cockpit,garrett/cockpit,mareklibra/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,Scribery/cockpit,mareklibra/cockpit,harishanand95/cockpit,sgallagher/cockpit,deryni/cockpit,harishanand95/cockpit,deryni/cockpit,SotolitoLabs/cockpit,vanloswang/cockpit,cockpit-project/cockpit