test: Robustify ABRT report test
test: Robustify ABRT report test

The pkill sometimes also killed a running `pmsleep` process, which
messes up the expected stack trace and function.

    abrt-notification[2015]: Process 1858 (pmsleep) crashed in _dl_relocate_object()
    systemd-coredump[1868]: Process 1857 (sleep) of user 0 dumped core.
    systemd-coredump[1869]: Process 1858 (pmsleep) of user 0 dumped core.

petervo/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,petervo/cockpit,cockpituous/cockpit,mvollmer/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,deryni/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,Scribery/cockpit,deryni/cockpit,stefwalter/cockpit,cockpituous/cockpit,garrett/cockpit,stefwalter/cockpit,garrett/cockpit,mvollmer/cockpit,stefwalter/cockpit,cockpit-project/cockpit,mvollmer/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,Scribery/cockpit,mvollmer/cockpit,andreasn/cockpit,moraleslazaro/cockpit,Scribery/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,mareklibra/cockpit,mareklibra/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,martinpitt/cockpit,stefwalter/cockpit,Scribery/cockpit,deryni/cockpit,andreasn/cockpit,martinpitt/cockpit,andreasn/cockpit,petervo/cockpit,cockpituous/cockpit,deryni/cockpit,mareklibra/cockpit,andreasn/cockpit,stefwalter/cockpit,petervo/cockpit,garrett/cockpit,Scribery/cockpit,deryni/cockpit,andreasn/cockpit,deryni/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,cockpituous/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,Scribery/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,moraleslazaro/cockpit,garrett/cockpit,petervo/cockpit,Scribery/cockpit,mareklibra/cockpit,petervo/cockpit,andreasn/cockpit,cockpit-project/cockpit,petervo/cockpit,mvollmer/cockpit,andreasn/cockpit,garrett/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,deryni/cockpit,SotolitoLabs/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit