Move scheduler code out of plugin directory.

This moves plugin/pkg/scheduler to pkg/scheduler and
plugin/cmd/kube-scheduler to cmd/kube-scheduler.

Bulk of the work was done with gomvpkg, except for kube-scheduler main
package.

pkg/scheduler/algorithmprovider/defaults/defaults_test.go

@@ -0,0 +1,87 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package defaults
+
+import (
+	"testing"
+
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
+)
+
+func TestCopyAndReplace(t *testing.T) {
+	testCases := []struct {
+		set         sets.String
+		replaceWhat string
+		replaceWith string
+		expected    sets.String
+	}{
+		{
+			set:         sets.String{"A": sets.Empty{}, "B": sets.Empty{}},
+			replaceWhat: "A",
+			replaceWith: "C",
+			expected:    sets.String{"B": sets.Empty{}, "C": sets.Empty{}},
+		},
+		{
+			set:         sets.String{"A": sets.Empty{}, "B": sets.Empty{}},
+			replaceWhat: "D",
+			replaceWith: "C",
+			expected:    sets.String{"A": sets.Empty{}, "B": sets.Empty{}},
+		},
+	}
+	for _, testCase := range testCases {
+		result := copyAndReplace(testCase.set, testCase.replaceWhat, testCase.replaceWith)
+		if !result.Equal(testCase.expected) {
+			t.Errorf("expected %v got %v", testCase.expected, result)
+		}
+	}
+}
+
+func TestDefaultPriorities(t *testing.T) {
+	result := sets.NewString(
+		"SelectorSpreadPriority",
+		"InterPodAffinityPriority",
+		"LeastRequestedPriority",
+		"BalancedResourceAllocation",
+		"NodePreferAvoidPodsPriority",
+		"NodeAffinityPriority",
+		"TaintTolerationPriority")
+	if expected := defaultPriorities(); !result.Equal(expected) {
+		t.Errorf("expected %v got %v", expected, result)
+	}
+}
+
+func TestDefaultPredicates(t *testing.T) {
+	result := sets.NewString(
+		"NoVolumeZoneConflict",
+		"MaxEBSVolumeCount",
+		"MaxGCEPDVolumeCount",
+		"MaxAzureDiskVolumeCount",
+		"MatchInterPodAffinity",
+		"NoDiskConflict",
+		"GeneralPredicates",
+		"CheckNodeMemoryPressure",
+		"CheckNodeDiskPressure",
+		"CheckNodeCondition",
+		"PodToleratesNodeTaints",
+		predicates.CheckVolumeBindingPred,
+	)
+
+	if expected := defaultPredicates(); !result.Equal(expected) {
+		t.Errorf("expected %v got %v", expected, result)
+	}
+}