Binauthz blueprint fixes related to project creation

blueprints/gke/binauthz/main.tf

@@ -33,8 +33,9 @@ module "project" {
     ? var.project_create.parent
     : null
   )
-  prefix = var.project_create == null ? null : var.prefix
-  name   = var.project_id
+  project_create = var.project_create != null
+  prefix         = var.project_create == null ? null : var.prefix
+  name           = var.project_id
   services = [
     "artifactregistry.googleapis.com",
     "binaryauthorization.googleapis.com",

tests/blueprints/gke/binauthz/fixture/variables.tf

@@ -17,7 +17,10 @@ variable "project_create" {
     billing_account_id = string
     parent             = string
   })
-  default = null
+  default = {
+    billing_account_id = "12345-12345-12345"
+    parent             = "folders/123456789"
+  }
 }
 
 variable "project_id" {