Only use current VM products for testing
Added isPublic() consistency checks
Added a null-check for VerticalScalingCapabilities
Added more capabilities checks
Low ports are not supported by most systems, changed to high ports
Disabled very GCE-specific test
Disabled very GCE-specific tests, WIP changes in listAccess() which is still failing in AWS
Merge pull request #131 from maksimov/develop

Tests review