Update engine-api vendored version

Signed-off-by: Nishant Totla <nishanttotla@gmail.com>

vendor/src/github.com/docker/engine-api/client/interface.go

@@ -100,11 +100,11 @@ type NodeAPIClient interface {
 
 // ServiceAPIClient defines API client methods for the services
 type ServiceAPIClient interface {
-	ServiceCreate(ctx context.Context, service swarm.ServiceSpec) (types.ServiceCreateResponse, error)
+	ServiceCreate(ctx context.Context, service swarm.ServiceSpec, headers map[string][]string) (types.ServiceCreateResponse, error)
 	ServiceInspectWithRaw(ctx context.Context, serviceID string) (swarm.Service, []byte, error)
 	ServiceList(ctx context.Context, options types.ServiceListOptions) ([]swarm.Service, error)
 	ServiceRemove(ctx context.Context, serviceID string) error
-	ServiceUpdate(ctx context.Context, serviceID string, version swarm.Version, service swarm.ServiceSpec) error
+	ServiceUpdate(ctx context.Context, serviceID string, version swarm.Version, service swarm.ServiceSpec, headers map[string][]string) error
 	TaskInspectWithRaw(ctx context.Context, taskID string) (swarm.Task, []byte, error)
 	TaskList(ctx context.Context, options types.TaskListOptions) ([]swarm.Task, error)
 }

vendor/src/github.com/docker/engine-api/client/service_create.go

@@ -9,9 +9,9 @@ import (
 )
 
 // ServiceCreate creates a new Service.
-func (cli *Client) ServiceCreate(ctx context.Context, service swarm.ServiceSpec) (types.ServiceCreateResponse, error) {
+func (cli *Client) ServiceCreate(ctx context.Context, service swarm.ServiceSpec, headers map[string][]string) (types.ServiceCreateResponse, error) {
 	var response types.ServiceCreateResponse
-	resp, err := cli.post(ctx, "/services/create", nil, service, nil)
+	resp, err := cli.post(ctx, "/services/create", nil, service, headers)
 	if err != nil {
 		return response, err
 	}

vendor/src/github.com/docker/engine-api/client/service_update.go

@@ -9,10 +9,10 @@ import (
 )
 
 // ServiceUpdate updates a Service.
-func (cli *Client) ServiceUpdate(ctx context.Context, serviceID string, version swarm.Version, service swarm.ServiceSpec) error {
+func (cli *Client) ServiceUpdate(ctx context.Context, serviceID string, version swarm.Version, service swarm.ServiceSpec, headers map[string][]string) error {
 	query := url.Values{}
 	query.Set("version", strconv.FormatUint(version.Index, 10))
-	resp, err := cli.post(ctx, "/services/"+serviceID+"/update", query, service, nil)
+	resp, err := cli.post(ctx, "/services/"+serviceID+"/update", query, service, headers)
 	ensureReaderClosed(resp)
 	return err
 }