Bug 1055371
Node Platform - Optionally generate application key

* create .openshift_ssh directory when creating gear
Bug 1049044: Creating a single sshkey for each scalable application
rsync private key over to new proxy gears
Fixing essentials test
Merge pull request #4567 from danmcp/master

Merged by openshift-bot
Merge pull request #4568 from danmcp/bug1049044

Merged by openshift-bot
Bug 974933 - Inconsistent message is shown when rhc threaddump for a scaled up app
Merge pull request #4569 from jhadvig/threaddump

Merged by openshift-bot