TT#63466 TT#54511 Stop using Google DNS servers for heartbeat.pingnodes

It randomly causes problems like:

> Aug 27 16:07:39 sp2 heartbeat: [28963]: WARN: string2msg_ll: node [8.8.8.8] failed authentication
> Aug 27 16:07:39 sp2 heartbeat: [28959]: WARN: string2msg_ll: node [8.8.8.8] failed authentication
> Aug 27 16:07:41 sp2 heartbeat: [28963]: WARN: string2msg_ll: node [8.8.8.8] failed authentication
> Aug 27 16:07:41 sp2 heartbeat: [28961]: WARN: string2msg_ll: node [8.8.8.8] failed authentication
> Aug 27 16:07:41 sp2 heartbeat: [28959]: WARN: string2msg_ll: node [8.8.8.8] failed authentication
> Aug 27 16:07:43 sp2 heartbeat: [28963]: WARN: string2msg_ll: node [8.8.8.8] failed authentication
> Aug 27 16:07:43 sp2 heartbeat: [28959]: WARN: string2msg_ll: node [8.8.8.8] failed authentication

It makes heatbeat crazy.

Change-Id: I9dc6839cc219ed3874975de2a1f4df83c75c690c
(cherry picked from commit 310752a503)

grub.cfg

@@ -50,7 +50,7 @@ menuentry "Install Debian/stretch 64bit" {
 
 menuentry "Install Debian/stretch 64bit - Puppet" {
   echo 'Loading kernel...'
-  linux /boot/%SHORT_NAME%/vmlinuz live-media-path=/live/%GRML_NAME%/ boot=live bootid=%BOOTID% apm=power-off mgag200.modeset=0 vga=791 quiet nomce net.ifnames=0 nongcp ssh=sipwise debianrelease=stretch scripts puppetenv=production dns=1.1.1.1,8.8.8.8 ip=10.15.20.123::10.15.20.1:255.255.255.0:puppet-client42:eth0:off 
+  linux /boot/%SHORT_NAME%/vmlinuz live-media-path=/live/%GRML_NAME%/ boot=live bootid=%BOOTID% apm=power-off mgag200.modeset=0 vga=791 quiet nomce net.ifnames=0 nongcp ssh=sipwise debianrelease=stretch scripts puppetenv=production dns=1.1.1.1,1.0.0.1 ip=10.15.20.123::10.15.20.1:255.255.255.0:puppet-client42:eth0:off 
   echo 'Loading initrd...'
   initrd /boot/%SHORT_NAME%/initrd.img
 }

isolinux.cfg

@@ -122,7 +122,7 @@ label stretch
 label stretchpuppet
   menu label Install Debian/stretch  64bit - Puppet
   kernel /boot/%SHORT_NAME%/vmlinuz
-  append initrd=/boot/%SHORT_NAME%/initrd.img live-media-path=/live/%GRML_NAME%/ boot=live bootid=%BOOTID% apm=power-off mgag200.modeset=0 vga=791 quiet nomce net.ifnames=0 nongcp ssh=sipwise debianrelease=stretch scripts puppetenv=production dns=1.1.1.1,8.8.8.8 ip=10.15.20.123::10.15.20.1:255.255.255.0:puppet-client42:eth0:off 
+  append initrd=/boot/%SHORT_NAME%/initrd.img live-media-path=/live/%GRML_NAME%/ boot=live bootid=%BOOTID% apm=power-off mgag200.modeset=0 vga=791 quiet nomce net.ifnames=0 nongcp ssh=sipwise debianrelease=stretch scripts puppetenv=production dns=1.1.1.1,1.0.0.1 ip=10.15.20.123::10.15.20.1:255.255.255.0:puppet-client42:eth0:off 
 
   text help
                                      Install Debian stretch, 64bit using