Increase the handling of 409 errors when node creation fails

When creating a node with a 409 error, try again later.

Signed-off-by: Zhou Hao <zhouhao@fujitsu.com>

pkg/provisioner/ironic/ironic.go

@@ -382,12 +382,17 @@ func (p *ironicProvisioner) ValidateManagementAccess(data provisioner.Management
 					"capabilities": bootModeCapabilities[data.BootMode],
 				},
 			}).Extract()
-		// FIXME(dhellmann): Handle 409 and 503? errors here.
-		if err != nil {
+		switch err.(type) {
+		case nil:
+			p.publisher("Registered", "Registered new host")
+		case gophercloud.ErrDefault409:
+			p.log.Info("could not register host in ironic, busy")
+			result, err = retryAfterDelay(provisionRequeueDelay)
+			return
+		default:
 			result, err = transientError(errors.Wrap(err, "failed to register host in ironic"))
 			return
 		}
-		p.publisher("Registered", "Registered new host")
 
 		// Store the ID so other methods can assume it is set and so
 		// we can find the node again later.