Don't print all test suite errors to stderr in vmx2xmltest
Don't print all test suite errors to stderr in vmx2xmltest

The vmx2xmltest test would print all errors to stderr, which
is not helpful when running OOM tests, and differs from the
behaviour of other tests.

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

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