Update aws-java-sdk-core to 1.12.550 #1424

Job	Run time
integrationTest ([email protected], 2.12.17)	5m 56s
integrationTest ([email protected], 2.13.8)	6m 13s
integrationTest ([email protected], 2.12.17)	5m 14s
lint	1m 50s
mdoc	3m 4s
integrationTest ([email protected], 2.13.8)	8m 41s
publishLocal	8m 50s
test ([email protected], 2.12.17)	6m 37s
test ([email protected], 2.13.8)	4m 56s
test ([email protected], 2.12.17)	5m 39s
test ([email protected], 2.13.8)	5m 24s
publish	0s
	1h 2m 24s

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