systemvmtemplate: don't slow VR reboot for vmware

VMware router will be rebooted based on #2794, per current config
the VRs on reboot will go through fsck checks slowing down the deployment
process by few seconds. This will ensure that fsck checks are done
on every 3rd boot of the VR. The `4` is used because 1st boot is done
during the build of systemvmtemplate appliance.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: yadvr

tools/appliance/systemvmtemplate/scripts/apt_upgrade.sh

@@ -19,12 +19,12 @@
 set -e
 set -x
 
-# Perform fsck check on every 2nd boot
+# Perform fsck check on every 3rd boot
 function fix_tune2fs() {
   for partition in $(blkid -o list | grep ext | awk '{print $1}')
   do
     tune2fs -m 0 $partition
-    tune2fs -c 3 $partition
+    tune2fs -c 4 $partition
   done
   fdisk -l
   df -h