dnsmasq - increase dns-forward-max, cache-size

bug 1560489
https://bugzilla.redhat.com/show_bug.cgi?id=1560489

Signed-off-by: Phil Cameron <pcameron@redhat.com>

roles/openshift_node/templates/origin-dns.conf.j2

@@ -3,8 +3,8 @@ domain-needed
 no-negcache
 max-cache-ttl=1
 enable-dbus
-dns-forward-max=5000
-cache-size=5000
+dns-forward-max=10000
+cache-size=10000
 bind-dynamic
 {% for interface in openshift_node_dnsmasq_except_interfaces %}
 except-interface={{ interface }}