Add test for sudt cross payment #955

Job	Run time
e2e test for 3-nodes-transfer --env test	12m 6s
e2e test for invoice-ops --env test	11m 13s
e2e test for open-use-close-a-channel --env test	11m 25s
e2e test for udt --env test	11m 23s
e2e test for reestablish --env test	11m 21s
e2e test for cross-chain-hub --env test	11m 20s
e2e test for router-pay --env test	12m 31s
e2e test for udt-router-pay --env test	11m 31s
e2e test for watchtower --env test	13m 2s
e2e test for udt --env xudt-test	11m 40s
e2e test for 3-nodes-transfer --env test --env-var HASH_ALGORITHM=sha256	11m 39s
	2h 9m 11s

Provide feedback