Relicense LAVA to GPLv2+
Before this patch, LAVA code was licensed under GPLv2 (or later) or AGPLv3, depending on the python module. This commit relicense all the code to GPLv2 or later.
Approval from the relevant contributors has been requested and granted before hand. Contributors will confirm the aggreement by replying to the gitlab merge request. The commit will be updated to add the relevant Ack-by flags.
Signed-off-by: Rémi Duraffort remi.duraffort@linaro.org