Install systemd service files into /usr/lib/

Install systemd service files into a location that will work on Fedora as well
as on openSUSE. Note, that on Fedora /lib is just a symlink to /usr/lib anyway.

Change-Id: If1dcd0d428d36d587fab501d42b0c8689a972e31
Merge "Install systemd service files into /usr/lib/"