base: Make iface and path_namespace of DBusProxies read-only
base: Make iface and path_namespace of DBusProxies read-only

Closes #1414
Reviewed-by: Stef Walter <8a7fbf0f15d3ad982af54ef28f5c117d2494b76c@redhat.com>

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