hardcode stable image for rpc deployment (temporary) #1164

Job	Run time
tests (A-B tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFinOrg/...	1m 17s
tests (C-[a-m] tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFin...	1m 43s
tests (C-[n-o] tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFin...	7m 31s
tests (C-[p-z] tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFin...	29s
tests (D-I tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFinOrg/...	3m 59s
tests (J-N tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFinOrg/...	2m 7s
tests (O-R tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFinOrg/...	1m 36s
tests (S tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFinOrg/XD...	12m 56s
tests (T-Z tests, go run build/ci.go test -coverage $(go list ./... \| grep "github.com/XinFinOrg/...	1m 41s
devnet_build_push	0s
tag_build	0s
rpcnode_terraform_apply	0s
devnet_terraform_apply	0s
mainnet_dev-upgrade_node	0s
testnet_dev-upgrade_node	0s
devnet_dev-upgrade_node	0s
devnet_send_notification	0s
	33m 19s

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