tools: Run npm install silently in make-source
tools: Run npm install silently in make-source

Even in silent mode it still has some output, so we direct that to
stderr, since stdout is used in vm-install to gather package names.

Closes #4152
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

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