test, e2e: Remove duplication when using PodClient.CreateSync

The CreateSync method includes the waiting for the pod to become running
and returns a fresh new pod instance.
In addition, errors are asserted in the method.

Therefore, there is no need for the callers to repeat these operations.
Some, like the error assertions, will never be reached in case they
occur as they will explode from within the method itself.

Signed-off-by: Edward Haas <edwardh@redhat.com>

test/e2e_node/node_problem_detector_linux.go

@@ -171,7 +171,7 @@ var _ = framework.KubeDescribe("NodeProblemDetector [NodeFeature:NodeProblemDete
 			ginkgo.By("Create the node problem detector")
 			hostPathType := new(v1.HostPathType)
 			*hostPathType = v1.HostPathType(string(v1.HostPathFileOrCreate))
-			f.PodClient().CreateSync(&v1.Pod{
+			pod := f.PodClient().CreateSync(&v1.Pod{
 				ObjectMeta: metav1.ObjectMeta{
 					Name: name,
 				},
@@ -237,8 +237,6 @@ var _ = framework.KubeDescribe("NodeProblemDetector [NodeFeature:NodeProblemDete
 					},
 				},
 			})
-			pod, err := f.PodClient().Get(context.TODO(), name, metav1.GetOptions{})
-			framework.ExpectNoError(err)
 			// TODO: remove hardcoded kubelet volume directory path
 			// framework.TestContext.KubeVolumeDir is currently not populated for node e2e
 			hostLogFile = "/var/lib/kubelet/pods/" + string(pod.UID) + "/volumes/kubernetes.io~empty-dir" + logFile