feat: add time_zone for mssql (#488)

Author: vponnam

modules/mssql/README.md

@@ -45,6 +45,7 @@ The following dependency must be available for SQL Server module:
 | secondary\_zone | The preferred zone for the secondary/failover instance, it should be something like: `us-central1-a`, `us-east1-c`. | `string` | `null` | no |
 | sql\_server\_audit\_config | SQL server audit config settings. | `map(string)` | `{}` | no |
 | tier | The tier for the master instance. | `string` | `"db-custom-2-3840"` | no |
+| time\_zone | The time zone for SQL instance. | `string` | `null` | no |
 | update\_timeout | The optional timeout that is applied to limit long database updates. | `string` | `"30m"` | no |
 | user\_labels | The key/value labels for the master instances. | `map(string)` | `{}` | no |
 | user\_name | The name of the default user | `string` | `"default"` | no |

modules/mssql/main.tf

@@ -105,6 +105,7 @@ resource "google_sql_database_instance" "default" {
     disk_size             = var.disk_size
     disk_type             = var.disk_type
     pricing_plan          = var.pricing_plan
+    time_zone             = var.time_zone
     dynamic "database_flags" {
       for_each = var.database_flags
       content {

modules/mssql/variables.tf

@@ -306,3 +306,9 @@ variable "deletion_protection" {
   type        = bool
   default     = true
 }
+
+variable "time_zone" {
+  description = "The time zone for SQL instance."
+  type        = string
+  default     = null
+}