Merge pull request #416 from chenyukang/tlc-wait-ack #1885

Job	Run time
e2e test for 3-nodes-transfer --env test	12m 37s
e2e test for invoice-ops --env test	11m 35s
e2e test for open-use-close-a-channel --env test	12m 11s
e2e test for udt --env test	12m 14s
e2e test for reestablish --env test	11m 59s
e2e test for cross-chain-hub --env test	12m 7s
e2e test for router-pay --env test	13m 3s
e2e test for udt-router-pay --env test	12m 22s
e2e test for watchtower --env test	13m 26s
e2e test for udt --env xudt-test	12m 5s
e2e test for 3-nodes-transfer --env test --env-var HASH_ALGORITHM=sha256	12m 18s
	2h 15m 57s

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