run internet based tests.

run various native functions that only require a single machine.

MachineID returns the content of /etc/machine-id.

This execs gdbus, because we need to change uses to test perms.

TestFCOSGrowfs tests whether ignition-ostree-growfs.service was run successfully and check that filesystem size has been grown to at least 7 GB.

Test that the root disk's GUID was set to a random one on first boot.

Test that /etc/machine-id isn't empty or COREOS_BLANK_MACHINE_ID.

TestRHCOSGrowfs tests whether ignition-ostree-growfs.service was run successfully and check that filesystem size has been grown to at least 15 GB.

Test "Add User Manually", from https://coreos.com/os/docs/latest/adding-users.html.