Allow runners to update their own system information. Runners can now send
back os_name, os_version and agent_id back as part of a POST to
CALLBACK_URL/system-info/.
The goal is to get better info in regard to the actual OS that's running
and to move the agent_id from the status updates to the system-info callback.
The status updates should be used only to send back info about the status of
the installation process.
Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>
2a5e2409b2