Remove in-function import of netinfo

Since the circular module dependency had been solved in
http://gerrit.ovirt.org/13838, we could remove the in-function
import.

Change-Id: I0d51db19727c6f9ee55bfba030d4e324637b7465
Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Reviewed-on: http://gerrit.ovirt.org/14690
Reviewed-by: Dan Kenigsberg <danken@redhat.com>