test: Get rid of redundant file parsing
test: Get rid of redundant file parsing

The network description file was being read and parsed very often.
Instead, we can parse it once when constructing a vm and keep using it.

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

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