The message generated by systemctl has been updated in 9321e23c40, which requires a corresponding change in the systemd module.
In addition, this fixes the module when the SYSTEMD_OFFLINE environment variable is set.
* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
A preliminary set of test targets for "core" supported module that had no independent tests. These will also help us ensure python3 compatibility for those modules and prevent future regressions.
