netinfo: Make a test run under RHEL 6.5

dhclient still resides in /sbin/dhclient.

dnsmasq does not accept the --bind-dynamic option.
For testing purposes, --bind-interfaces is enough
although it generates a warning:

LOUD WARNING: listening on 240.0.0.1 may accept requests via interfaces other than veth_23
LOUD WARNING: use --bind-dynamic rather than --bind-interfaces to avoid DNS amplification attacks via these interface(s)

Change-Id: Iee3e9e49e8392e08743706f5857a3325a4024bb4
Bug-Url: https://bugzilla.redhat.com/987813
Signed-off-by: Ondřej Svoboda <osvoboda@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/24201
Reviewed-by: Dan Kenigsberg <danken@redhat.com>