script to run smoke tests for libvirt platform

[rajatchopra]

Signed-off-by: Rajat Chopra [email protected]

Just getting started with tests for libvirt. This script lets smoke tests run on libvirt platform.
TODO:

• Add script to automatically obtain master's IP address to configure DNS so that resource resolution works

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[openshift-ci-robot]

@rajatchopra: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/unit	796b406	link	/test unit

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[wking]

There's a fair amount of overlap between your new run_libvirt.sh and the existing run.sh. Can we use a single script and switch between backends with a command line option or something? I've sketched that out here (untested) is case it helps.