virFileWrapperFd: Switch to new virCommandDoAsyncIO
virFileWrapperFd: Switch to new virCommandDoAsyncIO

Commit 34e8f63a32f83 introduced support for catching errors from
libvirt iohelper. However, at those times there wasn't such fancy
API as virCommandDoAsyncIO(), so everything has to be implemented
on our own. But since we do have the API now, we can use it and
drop our implementation then.

agx/libvirt,libvirt/libvirt,agx/libvirt,nertpinx/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,taget/libvirt,iam-TJ/libvirt,jardasgit/libvirt,taget/libvirt,iam-TJ/libvirt,VenkatDatta/libvirt,libvirt/libvirt,cbosdo/libvirt,crobinso/libvirt,taget/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,zippy2/libvirt,taget/libvirt,andreabolognani/libvirt,trainstack/libvirt,datto/libvirt,siboulet/libvirt-openvz,jfehlig/libvirt,olafhering/libvirt,taget/libvirt,cbosdo/libvirt,jfehlig/libvirt,rlaager/libvirt,eskultety/libvirt,olafhering/libvirt,libvirt/libvirt,trainstack/libvirt,jfehlig/libvirt,cbosdo/libvirt,rlaager/libvirt,zippy2/libvirt,elmarco/libvirt,iam-TJ/libvirt,elmarco/libvirt,andreabolognani/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,rlaager/libvirt,shugaoye/libvirt,crobinso/libvirt,elmarco/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,datto/libvirt,shugaoye/libvirt,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,siboulet/libvirt-openvz,rlaager/libvirt,eskultety/libvirt,nertpinx/libvirt,crobinso/libvirt,trainstack/libvirt,cbosdo/libvirt,iam-TJ/libvirt,datto/libvirt,agx/libvirt,iam-TJ/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,olafhering/libvirt,siboulet/libvirt-openvz,VenkatDatta/libvirt,trainstack/libvirt,olafhering/libvirt,andreabolognani/libvirt,trainstack/libvirt,VenkatDatta/libvirt,zippy2/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,andreabolognani/libvirt,zippy2/libvirt,rlaager/libvirt,datto/libvirt,datto/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,eskultety/libvirt,jardasgit/libvirt,jardasgit/libvirt,iam-TJ/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,zhlcindy/libvirt-1.1.4-maintain,elmarco/libvirt,crobinso/libvirt,agx/libvirt,jardasgit/libvirt,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,jfehlig/libvirt,eskultety/libvirt,agx/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt