Enabling multi-tenancy for fission objects. (#655)

This feature allows creation of fission objects in different namespaces, in addition to retaining the existing behavior of creating fission objects in default namespace if user doesnt provide one. 
It also removes cluster admin roles for fission-fetcher and fission-builder Service Accounts and grants them only those privileges that they need.

fission/watch.go

@@ -36,6 +36,7 @@ func wCreate(c *cli.Context) error {
 	if len(fnName) == 0 {
 		fatal("Need a function name to create a watch, use --function")
 	}
+	fnNamespace := c.String("fnNamespace")
 
 	namespace := c.String("ns")
 	if len(namespace) == 0 {
@@ -64,7 +65,7 @@ func wCreate(c *cli.Context) error {
 	w := &crd.KubernetesWatchTrigger{
 		Metadata: metav1.ObjectMeta{
 			Name:      watchName,
-			Namespace: metav1.NamespaceDefault,
+			Namespace: fnNamespace,
 		},
 		Spec: fission.KubernetesWatchTriggerSpec{
 			Namespace: namespace,
@@ -111,10 +112,11 @@ func wDelete(c *cli.Context) error {
 	if len(wName) == 0 {
 		fatal("Need name of watch to delete, use --name")
 	}
+	wNs := c.String("triggerns")
 
 	err := client.WatchDelete(&metav1.ObjectMeta{
 		Name:      wName,
-		Namespace: metav1.NamespaceDefault,
+		Namespace: wNs,
 	})
 	checkErr(err, "delete watch")
 
@@ -125,7 +127,9 @@ func wDelete(c *cli.Context) error {
 func wList(c *cli.Context) error {
 	client := getClient(c.GlobalString("server"))
 
-	ws, err := client.WatchList()
+	wNs := c.String("triggerns")
+
+	ws, err := client.WatchList(wNs)
 	checkErr(err, "list watches")
 
 	w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)