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/api/validation/validation_test.go

@@ -0,0 +1,80 @@
+/*
+Copyright 2015 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 validation
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/scheduler/api"
+)
+
+func TestValidatePolicy(t *testing.T) {
+	tests := []struct {
+		policy   api.Policy
+		expected error
+	}{
+		{
+			policy:   api.Policy{Priorities: []api.PriorityPolicy{{Name: "NoWeightPriority"}}},
+			expected: errors.New("Priority NoWeightPriority should have a positive weight applied to it or it has overflown"),
+		},
+		{
+			policy:   api.Policy{Priorities: []api.PriorityPolicy{{Name: "NoWeightPriority", Weight: 0}}},
+			expected: errors.New("Priority NoWeightPriority should have a positive weight applied to it or it has overflown"),
+		},
+		{
+			policy:   api.Policy{Priorities: []api.PriorityPolicy{{Name: "WeightPriority", Weight: 2}}},
+			expected: nil,
+		},
+		{
+			policy:   api.Policy{Priorities: []api.PriorityPolicy{{Name: "WeightPriority", Weight: -2}}},
+			expected: errors.New("Priority WeightPriority should have a positive weight applied to it or it has overflown"),
+		},
+		{
+			policy:   api.Policy{Priorities: []api.PriorityPolicy{{Name: "WeightPriority", Weight: api.MaxWeight}}},
+			expected: errors.New("Priority WeightPriority should have a positive weight applied to it or it has overflown"),
+		},
+		{
+			policy:   api.Policy{ExtenderConfigs: []api.ExtenderConfig{{URLPrefix: "http://127.0.0.1:8081/extender", PrioritizeVerb: "prioritize", Weight: 2}}},
+			expected: nil,
+		},
+		{
+			policy:   api.Policy{ExtenderConfigs: []api.ExtenderConfig{{URLPrefix: "http://127.0.0.1:8081/extender", PrioritizeVerb: "prioritize", Weight: -2}}},
+			expected: errors.New("Priority for extender http://127.0.0.1:8081/extender should have a positive weight applied to it"),
+		},
+		{
+			policy:   api.Policy{ExtenderConfigs: []api.ExtenderConfig{{URLPrefix: "http://127.0.0.1:8081/extender", FilterVerb: "filter"}}},
+			expected: nil,
+		},
+		{
+			policy: api.Policy{
+				ExtenderConfigs: []api.ExtenderConfig{
+					{URLPrefix: "http://127.0.0.1:8081/extender", BindVerb: "bind"},
+					{URLPrefix: "http://127.0.0.1:8082/extender", BindVerb: "bind"},
+				}},
+			expected: errors.New("Only one extender can implement bind, found 2"),
+		},
+	}
+
+	for _, test := range tests {
+		actual := ValidatePolicy(test.policy)
+		if fmt.Sprint(test.expected) != fmt.Sprint(actual) {
+			t.Errorf("expected: %s, actual: %s", test.expected, actual)
+		}
+	}
+}