Refine validation error message for netapp_size_in_tb variable

Signed-off-by: David.Houck <David.Houck@sas.com>

variables.tf

@@ -500,8 +500,8 @@ variable "netapp_size_in_tb" {
   default     = 4
 
   validation {
-    condition     = var.netapp_size_in_tb != null ? var.netapp_size_in_tb >= 4 && var.netapp_size_in_tb <= 500 : null
-    error_message = "ERROR: netapp_size_in_tb - value must be between 4 and 500."
+    condition     = var.netapp_size_in_tb != null ? var.netapp_network_features == "Basic" ? var.netapp_size_in_tb >= 4 && var.netapp_size_in_tb <= 500 : var.netapp_size_in_tb >= 1 && var.netapp_size_in_tb <= 500 : null
+    error_message = "ERROR: netapp_size_in_tb - For 'Basic' netapp_network_features, value must be between 4 and 500, for 'Standard' netapp_network_features, value must be between 1 and 500."
   }
 }