snapshotpolicy list create delete apply cancel finish except that disk sync snapshot policy

add copyright

fix some imprefection

fix test file

pkg/util/bitmap/bitmap.go

@@ -0,0 +1,36 @@
+// Copyright 2019 Yunion
+//
+// 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 bitmap
+
+func Uint2IntArray(n uint32) []int {
+	ret := make([]int, 0, 2)
+	var i uint = 0
+	for n != 0 {
+		if n&(1<<i) != 0 {
+			n &= uint32(^(1 << i))
+			ret = append(ret, int(i))
+		}
+		i++
+	}
+	return ret
+}
+
+func IntArray2Uint(nums []int) uint32 {
+	var ret uint32 = 0
+	for _, i := range nums {
+		ret |= (1 << uint(i))
+	}
+	return ret
+}