Merge pull request #291 from mdr-engineering/hotfix/ftd_na_ChangeRootDiskTo20Percent

Sets root volume disk free check to 20%

base/sensu-configuration/checks.tf

@@ -20,7 +20,7 @@ locals {
   # To ensure this list is complete:
   #   salt \* grains.get partitions | grep "^    /" | sort | uniq | grep -v snap
   disk_thresholds = {
-    "/root": "1000", # This is the / partition
+    "/root": "20%", # This is the / partition
     "/boot": "20%",
     "/home": "20%",
     "/opt": "20%",