Make Jenkins run integration tests under v2.0.0
Make Jenkins run integration tests under v2.0.0

We should run our integration tests using the oldest Ruby version we
support, version 2.0.0, as that version is the most likely to highlight
breaking changes, for example if gems we're dependent on stop supporting
version 2.0.x.

gds-operations/vcloud-edge_gateway,gds-operations/vcloud-edge_gateway,gds-operations/vcloud-edge_gateway