fix 101-cosmos-db-aad-rbac example (#144)

quickstart/101-cosmos-db-aad-rbac/variables.tf

@@ -1,30 +1,43 @@
-variable "resource_group_name" {
+variable "name_prefix" {
   type        = string
-  description = "Resource group name"
+  default     = "101-cosmos-db-aad-rbac"
+  description = "Prefix for resource group name"
 }
 
 variable "location" {
   type        = string
+  default     = "westus"
   description = "Resource group location"
 }
 
 variable "cosmosdb_account_name" {
   type        = string
+  default     = "default-account-name"
   description = "Cosmos db account name"
 }
 
 variable "cosmosdb_account_location" {
   type        = string
+  default     = "westus"
   description = "Cosmos db account location"
 }
 
 variable "cosmosdb_sqldb_name" {
   type        = string
+  default     = "default-sqldb-name"
   description = "value"
 }
 
+variable "msi_id" {
+  type        = string
+  default     = null
+  description = "If you're executing the test with user assigned identity, please pass the identity principal id to this variable."
+}
+
+
 variable "throughput" {
   type        = number
+  default     = 400
   description = "Cosmos db database throughput"
   validation {
     condition     = var.throughput >= 400 && var.throughput <= 1000000
@@ -38,5 +51,6 @@ variable "throughput" {
 
 variable "sql_container_name" {
   type        = string
+  default     = "default-sql-container-name"
   description = "SQL API container name."
 }