Remove title from playlist resource to fix acceptance tests (#2394)

* Remove title from playlist resource

* Update docs

Author: spinillos

docs/resources/playlist.md

@@ -22,14 +22,12 @@ resource "grafana_playlist" "test" {
     // Order is required, and is the order in which the dashboards will be displayed
     // The block order is ignored
     order = 2
-    title = "Terraform Dashboard By Tag"
     type  = "dashboard_by_tag"
     value = "terraform"
   }
 
   item {
     order = 1
-    title = "Terraform Dashboard By UID"
     type  = "dashboard_by_uid"
     value = "cIBgcSjkk"
   }

examples/resources/grafana_playlist/resource.tf

@@ -6,14 +6,12 @@ resource "grafana_playlist" "test" {
     // Order is required, and is the order in which the dashboards will be displayed
     // The block order is ignored
     order = 2
-    title = "Terraform Dashboard By Tag"
     type  = "dashboard_by_tag"
     value = "terraform"
   }
 
   item {
     order = 1
-    title = "Terraform Dashboard By UID"
     type  = "dashboard_by_uid"
     value = "cIBgcSjkk"
   }