test: Use 'payload' instead of 'protocol' in ph_dbus_ready.
test: Use 'payload' instead of 'protocol' in ph_dbus_ready.

So that we wait for the right client to be ready.

Reviewed-by: Patrick Uiterwijk <bd6d5394796bee9cca2245486eb583fd64b70226@redhat.com>
Closes #629

vbatts/cockpit,andreasn/cockpit,dperpeet/cockpit,haiyangd/cockpit_view,Armstrong1992/cockpit,mareklibra/cockpit,sgallagher/cockpit,firebitsbr/cockpit,deryni/cockpit,vbatts/cockpit,jscotka/cockpit,sub-mod/cockpit,Thermionix/cockpit,moolitayer/cockpit,jscotka/cockpit,stefwalter/cockpit,mareklibra/cockpit,Armstrong1992/cockpit,andreasn/cockpit,moolitayer/cockpit,vbatts/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,denysvitali/cockpit,harishanand95/cockpit,mareklibra/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,Armstrong1992/cockpit,cockpituous/cockpit,larskarlitski/cockpit,maxamillion/cockpit,Scribery/cockpit,vanloswang/cockpit,fridex/cockpit,harishanand95/cockpit,vanloswang/cockpit,fridex/cockpit,garrett/cockpit,larsu/cockpit,michalskrivanek/cockpit,deryni/cockpit,netzvieh/cockpit,zigitax/cockpit,mvollmer/cockpit,sub-mod/cockpit,haiyangd/cockpit_view,dperpeet/cockpit,larsu/cockpit,larskarlitski/cockpit,jscotka/cockpit,deryni/cockpit,larsu/cockpit,xhad/cockpit,FireDrunk/cockpit,cockpituous/cockpit,larskarlitski/cockpit,garrett/cockpit,nmav/cockpit,michalskrivanek/cockpit,larskarlitski/cockpit,mareklibra/cockpit,cockpituous/cockpit,dperpeet/cockpit,xhad/cockpit,moraleslazaro/cockpit,deryni/cockpit,mvollmer/cockpit,sgallagher/cockpit,vbatts/cockpit,Thermionix/cockpit,michalskrivanek/cockpit,jscotka/cockpit,martinpitt/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,netzvieh/cockpit,netzvieh/cockpit,evol262/cockpit,fridex/cockpit,firebitsbr/cockpit,FireDrunk/cockpit,Armstrong1992/cockpit,moraleslazaro/cockpit,jscotka/cockpit,cockpituous/cockpit,arilivigni/cockpit,larskarlitski/cockpit,xhad/cockpit,vanloswang/cockpit,dperpeet/cockpit,michalskrivanek/cockpit,mvollmer/cockpit,matobet/cockpit,mareklibra/cockpit,darioajr/cockpit,evol262/cockpit,Scribery/cockpit,maxamillion/cockpit,matobet/cockpit,dperpeet/cockpit,xhad/cockpit,sub-mod/cockpit,nmav/cockpit,denysvitali/cockpit,andreasn/cockpit,deryni/cockpit,larsu/cockpit,vbatts/cockpit,martinpitt/cockpit,xhad/cockpit,Scribery/cockpit,petervo/cockpit,arilivigni/cockpit,cockpit-project/cockpit,andreasn/cockpit,moolitayer/cockpit,michalskrivanek/cockpit,larskarlitski/cockpit,sgallagher/cockpit,petervo/cockpit,Thermionix/cockpit,netzvieh/cockpit,sub-mod/cockpit,FireDrunk/cockpit,Scribery/cockpit,fridex/cockpit,michalskrivanek/cockpit,darioajr/cockpit,sgallagher/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,mareklibra/cockpit,stefwalter/cockpit,larskarlitski/cockpit,petervo/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,maxamillion/cockpit,deryni/cockpit,SotolitoLabs/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,larsu/cockpit,petervo/cockpit,arilivigni/cockpit,evol262/cockpit,fridex/cockpit,xhad/cockpit,harishanand95/cockpit,stefwalter/cockpit,FireDrunk/cockpit,moolitayer/cockpit,denysvitali/cockpit,netzvieh/cockpit,Thermionix/cockpit,garrett/cockpit,petervo/cockpit,andreasn/cockpit,matobet/cockpit,kkaempf/cockpit,vanloswang/cockpit,michalskrivanek/cockpit,vanloswang/cockpit,Scribery/cockpit,zigitax/cockpit,mareklibra/cockpit,zigitax/cockpit,darioajr/cockpit,nmav/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,sub-mod/cockpit,firebitsbr/cockpit,sgallagher/cockpit,darioajr/cockpit,nmav/cockpit,deryni/cockpit,sgallagher/cockpit,Scribery/cockpit,denysvitali/cockpit,matobet/cockpit,zigitax/cockpit,vanloswang/cockpit,petervo/cockpit,garrett/cockpit,kkaempf/cockpit,matobet/cockpit,harishanand95/cockpit,haiyangd/cockpit_view,stefwalter/cockpit,nmav/cockpit,darioajr/cockpit,matobet/cockpit,maxamillion/cockpit,sgallagher/cockpit,arilivigni/cockpit,garrett/cockpit,jscotka/cockpit,harishanand95/cockpit,harishanand95/cockpit,kkaempf/cockpit,dperpeet/cockpit,xhad/cockpit,cockpit-project/cockpit,dperpeet/cockpit,petervo/cockpit,cockpituous/cockpit,maxamillion/cockpit,FireDrunk/cockpit,kkaempf/cockpit,SotolitoLabs/cockpit,arilivigni/cockpit,martinpitt/cockpit,kkaempf/cockpit,Thermionix/cockpit,evol262/cockpit,firebitsbr/cockpit,stefwalter/cockpit,arilivigni/cockpit,moolitayer/cockpit,cockpituous/cockpit,haiyangd/cockpit_view,larsu/cockpit,cockpit-project/cockpit,Thermionix/cockpit,mvollmer/cockpit,haiyangd/cockpit_view,firebitsbr/cockpit,fridex/cockpit,moraleslazaro/cockpit,evol262/cockpit,Scribery/cockpit,Armstrong1992/cockpit,evol262/cockpit,martinpitt/cockpit,harishanand95/cockpit,denysvitali/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,andreasn/cockpit,zigitax/cockpit,vanloswang/cockpit,vbatts/cockpit,netzvieh/cockpit,arilivigni/cockpit