fail when cloudstack default view empty
Added support for OpenStack region for network service
Consolidation suggested by Wesley Beary
servers can still be nil under some circumstances (server id specified does no longer exist)
Merge pull request #1805 from torake/master

CloudStack: fails when there are no VMs in default view for user
[dynect] remove should usage in tests
Merge pull request #1816 from ceraslabs/region

Added support for OpenStack region for network service
Fixes #1822 Joyent list_machines is slower than it needs to be

[joyent|compute] list_machines unnecessarily fetches tags for each server
Merge branch 'master' of https://github.com/fog/fog