tests: Add support for skipping tests
tests: Add support for skipping tests

AM_TESTS has support for skipping tests, while the C-implementation
virtTestRun() does not support that feature.

Print "_" or "SKIP" in verbose mode for tests returning EXIT_AM_SKIP=77.

Signed-off-by: Philipp Hahn <8cb7a2c205789112a9f61bc3102305826b6a8db1@univention.de>

elmarco/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,warewolf/libvirt,taget/libvirt,VenkatDatta/libvirt,soulxu/libvirt-xuhj,leilihh/libvirt,eskultety/libvirt,andreabolognani/libvirt,rlaager/libvirt,leilihh/libvirt,rmarwaha/libvirt,libvirt/libvirt,danwent/libvirt-ovs,foomango/libvirt,jardasgit/libvirt,eskultety/libvirt,jeckersb/libvirt,novel/fbsd-libvirt,trainstack/libvirt,leilihh/libvirt,datto/libvirt,shugaoye/libvirt,wiedi/libvirt,elmarco/libvirt,andreabolognani/libvirt,dumbbell/libvirt,jeckersb/libvirt,trainstack/libvirt,usc-isi/libvirt,shugaoye/libvirt,soulxu/libvirt-xuhj,siboulet/libvirt-openvz,agx/libvirt,soulxu/libvirt-xuhj,novel/fbsd-libvirt,fabianfreyer/libvirt,warewolf/libvirt,fabianfreyer/libvirt,rlaager/libvirt,jeckersb/libvirt,jeckersb/libvirt,VenkatDatta/libvirt,emaste/libvirt,emaste/libvirt,jfehlig/libvirt,foomango/libvirt,novel/fbsd-libvirt,cbosdo/libvirt,novel/fbsd-libvirt,agx/libvirt,trainstack/libvirt,bjzhang/libvirt,emaste/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,jardasgit/libvirt,emaste/libvirt,olafhering/libvirt,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,danwent/libvirt-ovs,iam-TJ/libvirt,elmarco/libvirt,taget/libvirt,wiedi/libvirt,warewolf/libvirt,wiedi/libvirt,novel/fbsd-libvirt,dumbbell/libvirt,dumbbell/libvirt,zippy2/libvirt,leilihh/libvirt,dumbbell/libvirt,zhlcindy/libvirt-1.1.4-maintain,rmarwaha/libvirt,VenkatDatta/libvirt,bjzhang/libvirt,siboulet/libvirt-openvz,eskultety/libvirt,foomango/libvirt,andreabolognani/libvirt,taget/libvirt,cbosdo/libvirt,wiedi/libvirt,zippy2/libvirt,libvirt/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,usc-isi/libvirt,jeckersb/libvirt,libvirt/libvirt,agx/libvirt,siboulet/libvirt-openvz,shugaoye/libvirt,andreabolognani/libvirt,trainstack/libvirt,emaste/libvirt,rmarwaha/libvirt,andreabolognani/libvirt,shugaoye/libvirt,crobinso/libvirt,trainstack/libvirt,dumbbell/libvirt,jeckersb/libvirt,nertpinx/libvirt,eskultety/libvirt,wiedi/libvirt,emaste/libvirt,usc-isi/libvirt,warewolf/libvirt,danwent/libvirt-ovs,cbosdo/libvirt,rmarwaha/libvirt1,soulxu/libvirt-xuhj,bjzhang/libvirt,datto/libvirt,libvirt/libvirt,rmarwaha/libvirt1,agx/libvirt,datto/libvirt,fabianfreyer/libvirt,taget/libvirt,olafhering/libvirt,jardasgit/libvirt,datto/libvirt,shugaoye/libvirt,danwent/libvirt-ovs,iam-TJ/libvirt,zippy2/libvirt,zippy2/libvirt,usc-isi/libvirt,foomango/libvirt,leilihh/libvirt,rmarwaha/libvirt1,jeckersb/libvirt,jfehlig/libvirt,emaste/libvirt,wiedi/libvirt,crobinso/libvirt,iam-TJ/libvirt,jfehlig/libvirt,agx/libvirt,rlaager/libvirt,soulxu/libvirt-xuhj,bjzhang/libvirt,rmarwaha/libvirt1,rlaager/libvirt,siboulet/libvirt-openvz,olafhering/libvirt,danwent/libvirt-ovs,warewolf/libvirt,trainstack/libvirt,novel/fbsd-libvirt,elmarco/libvirt,novel/fbsd-libvirt,olafhering/libvirt,iam-TJ/libvirt,wiedi/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,nertpinx/libvirt,eskultety/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,rmarwaha/libvirt1,rmarwaha/libvirt,crobinso/libvirt,rmarwaha/libvirt,rlaager/libvirt,iam-TJ/libvirt,foomango/libvirt,siboulet/libvirt-openvz,usc-isi/libvirt,bjzhang/libvirt,elmarco/libvirt,datto/libvirt,warewolf/libvirt,rmarwaha/libvirt1,cbosdo/libvirt,crobinso/libvirt,trainstack/libvirt,rmarwaha/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,warewolf/libvirt,dumbbell/libvirt,jardasgit/libvirt,leilihh/libvirt,taget/libvirt