message: Update skus for Debian, SLES and Ubuntu
diff: "Debian":{
  "publisher":"credativ",
  "offer":"Debian",
  - "sku":"8",
  + "sku":"9",
  "version":"latest"
  },
  "openSUSE-Leap": {
  "SLES":{
  "publisher":"SUSE",
  "offer":"SLES",
  - "sku":"12-SP2",
  + "sku":"15",
  "version":"latest"
  },
  "UbuntuLTS":{
  "publisher":"Canonical",
  "offer":"UbuntuServer",
  - "sku":"16.04-LTS",
  + "sku":"18.04-LTS",
  "version":"latest"
  }
  },
  