kvm: add sanity check for kvm test

If success of former step is precondition of later step, when the former step
fails, the later step should be skiped, e.g. if the kvm initialization fails,
or the kvm.qcow2.gz isn't downloaded correctly, all the following tests should
be skipped, otherwise more failures are generated meanlessly, thus bug reporter
and analyzer aren't clear easily about which test fails.

Change-Id: Iaaa5c6842f8c6864b309cc6e7716a966986b03ef
Signed-off-by: Hongbo Zhang <hongbo.zhang@linaro.org>

0 files changed, 0 insertions, 0 deletions