Remove printOnce() on e2e tests

Originally, printOnce() was implemented for printing debugging message
once for checking actual value is the same as expected value.
However even if an error doesn't happen in ExpectEqual(), printOnce()
is called internally. Then the second ExpectEqual() doesn't output
the debugging message if an error happens. This makes debugging
difficult, let's just remove it for debugging.

Author: Kenichi Omichi

test/e2e/scheduling/predicates.go

@@ -745,35 +745,17 @@ func verifyResult(c clientset.Interface, expectedScheduled int, expectedNotSched
 	framework.ExpectNoError(err)
 	scheduledPods, notScheduledPods := e2epod.GetPodsScheduled(masterNodes, allPods)
 
-	printed := false
-	printOnce := func(msg string) string {
-		if !printed {
-			printed = true
-			return msg
-		}
-		return ""
-	}
-
-	framework.ExpectEqual(len(notScheduledPods), expectedNotScheduled, printOnce(fmt.Sprintf("Not scheduled Pods: %#v", notScheduledPods)))
-	framework.ExpectEqual(len(scheduledPods), expectedScheduled, printOnce(fmt.Sprintf("Scheduled Pods: %#v", scheduledPods)))
+	framework.ExpectEqual(len(notScheduledPods), expectedNotScheduled, fmt.Sprintf("Not scheduled Pods: %#v", notScheduledPods))
+	framework.ExpectEqual(len(scheduledPods), expectedScheduled, fmt.Sprintf("Scheduled Pods: %#v", scheduledPods))
 }
 
 // verifyReplicasResult is wrapper of verifyResult for a group pods with same "name: labelName" label, which means they belong to same RC
 func verifyReplicasResult(c clientset.Interface, expectedScheduled int, expectedNotScheduled int, ns string, labelName string) {
 	allPods := getPodsByLabels(c, ns, map[string]string{"name": labelName})
 	scheduledPods, notScheduledPods := e2epod.GetPodsScheduled(masterNodes, allPods)
 
-	printed := false
-	printOnce := func(msg string) string {
-		if !printed {
-			printed = true
-			return msg
-		}
-		return ""
-	}
-
-	framework.ExpectEqual(len(notScheduledPods), expectedNotScheduled, printOnce(fmt.Sprintf("Not scheduled Pods: %#v", notScheduledPods)))
-	framework.ExpectEqual(len(scheduledPods), expectedScheduled, printOnce(fmt.Sprintf("Scheduled Pods: %#v", scheduledPods)))
+	framework.ExpectEqual(len(notScheduledPods), expectedNotScheduled, fmt.Sprintf("Not scheduled Pods: %#v", notScheduledPods))
+	framework.ExpectEqual(len(scheduledPods), expectedScheduled, fmt.Sprintf("Scheduled Pods: %#v", scheduledPods))
 }
 
 func getPodsByLabels(c clientset.Interface, ns string, labelsMap map[string]string) *v1.PodList {