INTERNAL: qemu/cfg/tests-spice.cfg: Add rv file and gui tests.

Signed-off-by: Marian Krcmarik <mkrcmari@redhat.com>
client_guest_shutdown.py: Destroy VM gracefully.

If the shutdown is not successful, destroy the VM
gracefully, so It does not stay alive.

Signed-off-by: Marian Krcmarik <mkrcmari@redhat.com>
tests/rv_build_install.py: Change path to deploy epel repo func.

- Change path to deploy epel repository function which was moved
  to utils_spice under virttest.
- rv_clearx test does not exist anymore, use function from
  utils_spice as well.
- small refactor to fix warnings from pylint.

Signed-off-by: Marian Krcmarik <mkrcmari@redhat.com>
TEMPORARY: Hardcoded spice ports change.

Signed-off-by: Marian Krcmarik <mkrcmari@redhat.com>