Allow dot in function name

This patch enables the use-case for multiple namepsaces by
allowing a dot to be used in the function name.

dep has been run to update OpenFaaS projects and also to
prune unused files.

Tested by doing a build.

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

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

@@ -1,23 +0,0 @@
-package nats
-
-import (
-	"testing"
-)
-
-func TestGetClientID(t *testing.T) {
-	clientID := GetClientID("computer-a")
-	want := "computer-a"
-	if clientID != want {
-		t.Logf("Want clientID: `%s`, but got: `%s`\n", want, clientID)
-		t.Fail()
-	}
-}
-
-func TestGetClientIDWhenHostHasUnsupportedCharacters(t *testing.T) {
-	clientID := GetClientID("computer-a.acme.com")
-	want := "computer-a_acme_com"
-	if clientID != want {
-		t.Logf("Want clientID: `%s`, but got: `%s`\n", want, clientID)
-		t.Fail()
-	}
-}