[BUG]config.ServerInfo的字段IsDown发生DATA RACE

[CharLemAznable]

WARNING: DATA RACE

Write at :
github.com/apolloconfig/agollo/v4/env/server.SetDownNode()
github.com/apolloconfig/agollo/v4/protocol/http.RequestRecovery()
github.com/apolloconfig/agollo/v4/component/remote.(*asyncApolloConfig).notifyRemoteConfig()
github.com/apolloconfig/agollo/v4/component/remote.(*asyncApolloConfig).Sync()
github.com/apolloconfig/agollo/v4/component/notify.(*ConfigComponent).Start()
github.com/apolloconfig/agollo/v4/component.StartRefreshConfig()
github.com/apolloconfig/agollo/v4.StartWithConfig.func1()

Previous read at :
github.com/apolloconfig/agollo/v4/cluster/roundrobin.(*RoundRobin).Load()
github.com/apolloconfig/agollo/v4/protocol/http.loadBalance()
github.com/apolloconfig/agollo/v4/protocol/http.RequestRecovery()
github.com/apolloconfig/agollo/v4/component/remote.(*asyncApolloConfig).notifyRemoteConfig()
github.com/apolloconfig/agollo/v4/component/remote.(*asyncApolloConfig).Sync()
github.com/apolloconfig/agollo/v4/component/notify.(*ConfigComponent).Start()
github.com/apolloconfig/agollo/v4/component.StartRefreshConfig()
github.com/apolloconfig/agollo/v4.StartWithConfig.func1()

[stale]

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