Migrate away from queue type in faas project

The queue type now resides in the provider, so that there is
no risk of a circular reference.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

gateway/vendor/github.com/openfaas/faas-provider/types/model.go

@@ -2,6 +2,22 @@ package types
 
 import "time"
 
+// Secret for underlying orchestrator
+type Secret struct {
+	// Name of the secret
+	Name string `json:"name"`
+
+	// Namespace if applicable for the secret
+	Namespace string `json:"namespace,omitempty"`
+
+	// Value is a string representing the string's value
+	Value string `json:"value,omitempty"`
+
+	// RawValue can be used to provide binary data when
+	// Value is not set
+	RawValue []byte `json:"rawValue,omitempty"`
+}
+
 // FunctionDeployment represents a request to create or update a Function.
 type FunctionDeployment struct {
 
@@ -46,13 +62,6 @@ type FunctionDeployment struct {
 	ReadOnlyRootFilesystem bool `json:"readOnlyRootFilesystem,omitempty"`
 }
 
-// Secret for underlying orchestrator
-type Secret struct {
-	Name      string `json:"name"`
-	Namespace string `json:"namespace,omitempty"`
-	Value     string `json:"value,omitempty"`
-}
-
 // FunctionResources Memory and CPU
 type FunctionResources struct {
 	Memory string `json:"memory,omitempty"`

gateway/vendor/github.com/openfaas/faas-provider/types/queue.go

@@ -0,0 +1,42 @@
+package types
+
+import (
+	"net/http"
+	"net/url"
+)
+
+// Request for asynchronous processing
+type QueueRequest struct {
+	// Header from HTTP request
+	Header http.Header
+
+	// Host from HTTP request
+	Host string
+
+	// Body from HTTP request to use for invocation
+	Body []byte
+
+	// Method from HTTP request
+	Method string
+
+	// Path from HTTP request
+	Path string
+
+	// QueryString from HTTP request
+	QueryString string
+
+	// Function name to invoke
+	Function string
+
+	// QueueName to publish the request to, leave blank
+	// for default.
+	QueueName string
+
+	// Used by queue worker to submit a result
+	CallbackURL *url.URL `json:"CallbackUrl"`
+}
+
+// RequestQueuer can public a request to be executed asynchronously
+type RequestQueuer interface {
+	Queue(req *QueueRequest) error
+}

gateway/vendor/github.com/openfaas/nats-queue-worker/handler/nats_queue.go

@@ -8,7 +8,7 @@ import (
 	"time"
 
 	stan "github.com/nats-io/stan.go"
-	"github.com/openfaas/faas/gateway/queue"
+	ftypes "github.com/openfaas/faas-provider/types"
 )
 
 // NATSQueue queue for work
@@ -32,7 +32,7 @@ type NATSQueue struct {
 }
 
 // Queue request for processing
-func (q *NATSQueue) Queue(req *queue.Request) error {
+func (q *NATSQueue) Queue(req *ftypes.QueueRequest) error {
 	fmt.Printf("NatsQueue - submitting request: %s.\n", req.Function)
 
 	out, err := json.Marshal(req)