Correction to net-ssh version for Ruby < 2.0
Correction to net-ssh version for Ruby < 2.0

On closer look, it was net-ssh 2.10 that dropped support for Ruby < 2.0

Following up from #513

stefanhorning/specinfra,mizzy/specinfra,uroesch/specinfra,verisign/specinfra,serverspec/specinfra,minimum2scp/specinfra,sergueik/specinfra,ihassin/specinfra