Makes cache setting condition optional in fastly service

builtin/providers/fastly/resource_fastly_service_v1.go

@@ -318,17 +318,18 @@ func resourceServiceV1() *schema.Resource {
 							Required:    true,
 							Description: "A name to refer to this Cache Setting",
 						},
-						"cache_condition": {
-							Type:        schema.TypeString,
-							Required:    true,
-							Description: "Name of a condition to check if this Cache Setting applies",
-						},
 						"action": {
 							Type:        schema.TypeString,
 							Optional:    true,
 							Description: "Action to take",
 						},
 						// optional
+						"cache_condition": {
+							Type:        schema.TypeString,
+							Optional:    true,
+							Default:     "",
+							Description: "Name of a condition to check if this Cache Setting applies",
+						},
 						"stale_ttl": {
 							Type:        schema.TypeInt,
 							Optional:    true,

website/source/docs/providers/fastly/r/service_v1.html.markdown

@@ -209,7 +209,7 @@ The `cache_setting` block supports:
 * `name` - (Required) Unique name for this Cache Setting.
 * `action` - (Required) One of `cache`, `pass`, or `restart`, as defined
 on Fastly's documentation under ["Caching action descriptions"](https://docs.fastly.com/guides/performance-tuning/controlling-caching#caching-action-descriptions).
-* `cache_condition` - (Required) Name of already defined `condition` used to test whether this settings object should be used. This `condition` must be of type `CACHE`.
+* `cache_condition` - (Optional) Name of already defined `condition` used to test whether this settings object should be used. This `condition` must be of type `CACHE`.
 * `stale_ttl` - (Optional) Max "Time To Live" for stale (unreachable) objects.
 Default `300`.
 * `ttl` - (Optional) The Time-To-Live (TTL) for the object.