tests: Fixes Hybrid cluster network test

Previously, we've centralized several images into agnhost, including
test-webserver.

The Hybrid cluster network test was using the test-webserver image, and
was updated to use agnhost, but without properly making it so it behaves like
test-webserver, resulting in a failing test.

Author: claudiubelu

test/e2e/windows/hybrid_network.go

@@ -52,8 +52,10 @@ var _ = SIGDescribe("Hybrid cluster network", func() {
 		ginkgo.It("should have stable networking for Linux and Windows pods", func() {
 			ginkgo.By("creating linux and windows pods")
 			linuxPod := createTestPod(f, linuxBusyBoxImage, linuxOS)
+			linuxPod = f.PodClient().CreateSync(linuxPod)
 			windowsPod := createTestPod(f, windowsBusyBoximage, windowsOS)
 			windowsPod.Spec.Containers[0].Args = []string{"test-webserver"}
+			windowsPod = f.PodClient().CreateSync(windowsPod)
 
 			ginkgo.By("checking connectivity to 8.8.8.8 53 (google.com) from Linux")
 			assertConsistentConnectivity(f, linuxPod.ObjectMeta.Name, linuxOS, linuxCheck("8.8.8.8", 53))
@@ -130,5 +132,5 @@ func createTestPod(f *framework.Framework, image string, os string) *v1.Pod {
 			},
 		}
 	}
-	return f.PodClient().CreateSync(pod)
+	return pod
 }