Use dnsmasq to reduce system hangs on dns-server downtime

We would like to use reduce system hangs on dns-server by using dnsmasq
as dns cache server. This was reported and tracked in bnc#901497
Ok, so `resolv.conf` in Linux has limitation up to 3 nameservers ( MAXNS  equal to 3, see <resolv.h> ) 
Idea would be to keep `/etc/resolv-forwarders.conf` but add next two entries from DNS server list to `resolv.conf`. Mixing these two files for me, may cause some unexpected behaviors.