The new probe will convert all node's LatestControls to Controls, so
the old app can consume them. Also, the new app will convert all
node's Controls to LatestControl, so it can consume the reports from
old probes.
* alpine: dl-4.alpinelinux.org is dead, use another server
* increase buffer for docker stats
Attempt to avoid the following message:
docker container: dropping stats.
* probe: better timeout error messages
The logs contains the following messages:
Process reporter took longer than 1s
K8s reporter took longer than 1s
Docker reporter took longer than 1s
Endpoint reporter took longer than 1s
This patch prints how long it takes.
Squash of:
* Include plugins in the report
* show plugin list in the UI
* moving metric and metadata templates into the probe reports
* update js for prime -> priority
* added retry to plugin handshake
* added iowait plugin
* review feedback
* plugin documentation
