test: Wait for disk to be available before using it
test: Wait for disk to be available before using it

Fixes #2869
Closes #2877
Reviewed-by: Stef Walter <8a7fbf0f15d3ad982af54ef28f5c117d2494b76c@redhat.com>

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