Just try the first IP available if none found before

Some cloud don't implement correctly IP addresses.
Instead of failing during the provisionning, we just take the
first IP available and try with this one.

builtin/providers/openstack/resource_openstack_compute_instance_v2.go

@@ -246,11 +246,25 @@ func resourceComputeInstanceV2Read(d *schema.ResourceData, meta interface{}) err
 				pa := paRaw.(map[string]interface{})
 				if pa["version"].(float64) == 4 {
 					host = pa["addr"].(string)
-					d.Set("access_ip_v4", host)
+					break
 				}
 			}
 		}
 	}
+
+	// If no host found, just get the first IP we find
+	if host == "" {
+		for _, networkAddresses := range server.Addresses {
+			for _, element := range networkAddresses.([]interface{}) {
+				address := element.(map[string]interface{})
+				if address["version"].(float64) == 4 {
+					host = address["addr"].(string)
+					break
+				}
+			}
+		}
+	}
+	d.Set("access_ip_v4", host)
 	d.Set("host", host)
 
 	log.Printf("host: %s", host)