Upgrade xorm to v0.8.0 (#8536)

vendor/xorm.io/xorm/context_cache.go

@@ -0,0 +1,30 @@
+// Copyright 2018 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+// ContextCache is the interface that operates the cache data.
+type ContextCache interface {
+	// Put puts value into cache with key.
+	Put(key string, val interface{})
+	// Get gets cached value by given key.
+	Get(key string) interface{}
+}
+
+type memoryContextCache map[string]interface{}
+
+// NewMemoryContextCache return memoryContextCache
+func NewMemoryContextCache() memoryContextCache {
+	return make(map[string]interface{})
+}
+
+// Put puts value into cache with key.
+func (m memoryContextCache) Put(key string, val interface{}) {
+	m[key] = val
+}
+
+// Get gets cached value by given key.
+func (m memoryContextCache) Get(key string) interface{} {
+	return m[key]
+}