hv_xen: Test verifying hypervisor
hv_xen: Test verifying hypervisor

Test success and failure.

Signed-off-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>
Reviewed-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>

andir/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,onponomarev/ganeti,leshchevds/ganeti,dimara/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,mbakke/ganeti,bitemyapp/ganeti,yiannist/ganeti,dimara/ganeti,leshchevds/ganeti,andir/ganeti,ganeti/ganeti,apyrgio/ganeti,leshchevds/ganeti,bitemyapp/ganeti,mbakke/ganeti,yiannist/ganeti,yiannist/ganeti,mbakke/ganeti,onponomarev/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,apyrgio/ganeti