Export FQDN for managed Kubernetes cluster

- Set the FQDN for the Kubernetes cluster
- Remove the FQDN from the agent_pool_profile as it's not populated by
Azure for managed Kubernetes

azurerm/resource_arm_kubernetes_cluster.go

@@ -39,6 +39,11 @@ func resourceArmKubernetesCluster() *schema.Resource {
 				Computed: true,
 			},
 
+			"fqdn": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+
 			"kubernetes_version": {
 				Type:     schema.TypeString,
 				Optional: true,
@@ -95,11 +100,6 @@ func resourceArmKubernetesCluster() *schema.Resource {
 							Computed: true,
 						},
 
-						"fqdn": {
-							Type:     schema.TypeString,
-							Computed: true,
-						},
-
 						"vm_size": {
 							Type:     schema.TypeString,
 							Required: true,
@@ -243,6 +243,7 @@ func resourceArmKubernetesClusterRead(d *schema.ResourceData, meta interface{})
 	}
 	d.Set("resource_group_name", resGroup)
 	d.Set("dns_prefix", resp.DNSPrefix)
+	d.Set("fqdn", resp.Fqdn)
 	d.Set("kubernetes_version", resp.KubernetesVersion)
 
 	linuxProfile := flattenAzureRmKubernetesClusterLinuxProfile(*resp.ManagedClusterProperties.LinuxProfile)
@@ -318,10 +319,6 @@ func flattenAzureRmKubernetesClusterAgentPoolProfiles(profiles *[]containerservi
 			agentPoolProfile["dns_prefix"] = *profile.DNSPrefix
 		}
 
-		if profile.Fqdn != nil {
-			agentPoolProfile["fqdn"] = *profile.Fqdn
-		}
-
 		if profile.Name != nil {
 			agentPoolProfile["name"] = *profile.Name
 		}