tests: don't alter state in $HOME
tests: don't alter state in $HOME

Diego reported a bug where virsh tries to initialize a readline
history directory during 'make check' run as root, but fails
because /root was read-only.

It turns out that I could reproduce this as non-root, by using:

mv ~/.virsh{,.bak}
chmod a-w ~
make check -C tests TESTS=int-overflow
chmod u+w ~
mv ~/.virsh{.bak,}

* tests/int-overflow: Don't trigger interactive mode.
Reported by Diego Elio Pettenò.

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