Separate the creation of the keypair from the distribution of the keys to nodes
Less duplication
Create the fake keypair after starting the test server
whitespace
Clarify the reason for the list truncation
No need for thread
No need for threads
Use create_keypair rather than manually making unrealistic keys
Merge pull request #403 from ClusterHQ/sshkeygen-hang-401

Call ssh-keygen once before transferring keys to nodes

Author: @wallrj
Reviewers: @adamtheturtle, @itamarst

Refs #405

Fixes #401