Introduce Docker Snyk CLI scanner jobs. These jobs can be triggered
to download the latest version of Snyk's CLI scanner and trigger a
scan for Docker based repos. These jobs produce a report which is
published into Snyk's dashboard. These reports are fetched and
reflected back into the LFX Security tool.
Issue: RELENG-4609
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: Ifc9ab4c51393e893b22b06844f3701caaca06c6f