Don't call udevadm control --exit in systemd mode

This partly reverts commit a43f97c4e35d0d9c7e6e315e11c909e86936e1cc.

(cherry picked from commit 765d8408e9aafa45cd89a039f8b41f85191fd91f)

https://bugzilla.redhat.com/show_bug.cgi?id=1276983
1 file changed