Add peer group detection fixes from dfherr/dejima-prototype

[dfherr]

Hi guys,

just wanted to remind you that I implemented various fixes to the peer group detection and added peer group broadcasting end of August in https://github.com/dfherr/dejima-prototype

You might want to check out the additions (diffs to this project) in https://github.com/dfherr/dejima-prototype/tree/master/peer it includes:

• added broadcast after detection
• fixes for race conditions in peer group detection
• refactored Dejima class structure

The peer group detection was tested and evaluated in different scenarios with 3 dejima nodes in US and 20 dejima nodes distributed across europe and us.

Furthermore the project has added terraform scripts for booting a distributed dejima framework on Google Cloud (should be easily adjustable for AWS and other hosters supported by terraform):
https://github.com/dfherr/dejima-prototype/tree/master/terraform

It also includes docker-swarm scripts to centrally start and stop all dejima nodes
https://github.com/dfherr/dejima-prototype/tree/master/stacks

README#cloud-network-testing has some high-level info on this.

Best,
Dennis