Add LAVA metadata handling to LavaCallback class
Add LAVA metadata handling to LavaCallback class

Convert LAVA boot and job metadata hendling from functions to
LavaCallback methods.
Fix issue with newer LAVA versions that have "login-action" instead of
"auto-login-action"

Signed-off-by: Michal Galka <35351e7ebb7262d28d7902253ba30ca44ccd1bb4@collabora.com>

kernelci/kernelci-backend,kernelci/kernelci-backend