Deleting a namespace is insufficient to cleanup in e2e

Graceful deletion requires more time to terminate namespaces, and not
waiting for namespaces to delete causes scheduling errors

test/e2e/examples.go

@@ -63,7 +63,7 @@ var _ = Describe("Examples e2e", func() {
 
 	AfterEach(func() {
 		By(fmt.Sprintf("Destroying namespace for this suite %v", ns))
-		if err := c.Namespaces().Delete(ns); err != nil {
+		if err := deleteNS(c, ns); err != nil {
 			Failf("Couldn't delete ns %s", err)
 		}
 	})
@@ -458,7 +458,7 @@ var _ = Describe("Examples e2e", func() {
 				var err error
 				namespaces[i], err = createTestingNS(fmt.Sprintf("dnsexample%d", i), c)
 				if namespaces[i] != nil {
-					defer c.Namespaces().Delete(namespaces[i].Name)
+					defer deleteNS(c, namespaces[i].Name)
 				}
 				Expect(err).NotTo(HaveOccurred())
 			}