use new variable names in organization module

tests/modules/organization/fixture/main.tf

@@ -15,12 +15,12 @@
  */
 
 module "test" {
-  source                = "../../../../modules/organization"
-  org_id                = 1234567890
-  custom_roles          = var.custom_roles
-  iam_members           = var.iam_members
-  iam_additive_bindings = var.iam_additive_bindings
-  iam_audit_config      = var.iam_audit_config
-  policy_boolean        = var.policy_boolean
-  policy_list           = var.policy_list
+  source           = "../../../../modules/organization"
+  org_id           = 1234567890
+  custom_roles     = var.custom_roles
+  iam              = var.iam
+  iam_additive     = var.iam_additive
+  iam_audit_config = var.iam_audit_config
+  policy_boolean   = var.policy_boolean
+  policy_list      = var.policy_list
 }

tests/modules/organization/fixture/variables.tf

@@ -19,12 +19,12 @@ variable "custom_roles" {
   default = {}
 }
 
-variable "iam_members" {
+variable "iam" {
   type    = map(list(string))
   default = {}
 }
 
-variable "iam_additive_bindings" {
+variable "iam_additive" {
   type    = map(list(string))
   default = {}
 }