Reduce the number of Jenkins permanent slaves to a bare minimal. Most load should be shifted to Nodepool instances.
I have dropped a few already.
- green number of executors
- red running a build
- yellow available
https://integration.wikimedia.org/ci/label/UbuntuTrusty/load-statistics
https://integration.wikimedia.org/ci/label/DebianJessie/load-statistics
On Nov 8th


