address a few nits

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)
Fix io.Reader ambiguity on EOF in progressreader

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)
Merge pull request #7251 from tiborvass/fix-test-import-display

Fix test import display
Fix ordering in systemd service file
Systemd .service should also install .socket
Systemd servide should not restart on failure

This should not be done by default but with a drop-in.d file.