testutil: just add new function to be used for tests

To create keys based on other usernames without using environment
variables.

testutil/testutil.go

@@ -17,6 +17,16 @@ import (
 // kontrol.go) If the host does not have a kite.key file kite.New() panics.
 // This is a helper to put a fake key on it's location.
 func NewKiteKey() *jwt.Token {
+	return newKiteKey("")
+}
+
+// NewKiteKeyUsername is like NewKiteKey() but it uses the given username
+// instead of using the "testuser" name
+func NewKiteKeyUsername(username string) *jwt.Token {
+	return newKiteKey(username)
+}
+
+func newKiteKey(username string) *jwt.Token {
 	tknID, err := uuid.NewV4()
 	if err != nil {
 		panic(err)
@@ -27,7 +37,10 @@ func NewKiteKey() *jwt.Token {
 		panic(err)
 	}
 
-	username := "testuser"
+	if username == "" {
+		username = "testuser"
+	}
+
 	if testuser := os.Getenv("TESTKEY_USERNAME"); testuser != "" {
 		username = testuser
 	}
@@ -51,6 +64,7 @@ func NewKiteKey() *jwt.Token {
 
 	token.Valid = true
 	return token
+
 }
 
 func NewConfig() *config.Config {