message: Updating the skus names and clarified capacity description
  ARM signed off. merge it.
diff: },
  "capacity": {
  "$ref": "#/definitions/AzureCapacity",
  - "description": "The SKU capacity."
  + "description": "The number of instances of the cluster."
  }
  },
  "description": "Azure resource SKU definition."
  }
  },
  "minimum": {
  - "description": "Minimum allowed capacity.",
  + "description": "Minimum allowed instances count.",
  "type": "integer"
  },
  "maximum": {
  - "description": "Maximum allowed capacity.",
  + "description": "Maximum allowed instances count.",
  "type": "integer"
  },
  "default": {
  "description": "SKU name.",
  "type": "string",
  "enum": [
  - "D13_v2",
  - "D14_v2",
  - "L8",
  - "L16",
  - "D11_v2",
  - "D12_v2",
  - "L4"
  + "Standard_DS13_v2+1TB_PS",
  + "Standard_DS13_v2+2TB_PS",
  + "Standard_DS14_v2+3TB_PS",
  + "Standard_DS14_v2+4TB_PS",
  + "Standard_D13_v2",
  + "Standard_D14_v2",
  + "Standard_L8s",
  + "Standard_L16s",
  + "Standard_D11_v2",
  + "Standard_D12_v2",
  + "Standard_L4s",
  + "Dev(No SLA)_Standard_D11_v2"
  ],
  "x-ms-enum": {
  "name": "AzureSkuName",
  }
  },
  "capacity": {
  - "description": "SKU capacity.",
  + "description": "The number of instances of the cluster.",
  "type": "integer"
  },
  "tier": {
  "description": "SKU tier.",
  "type": "string",
  "enum": [
  + "Basic",
  "Standard"
  ],
  "x-ms-enum": {
  