Build

Bump spring to 3.3.7 #4855

# to view logs

Job	Run time
build	16m 5s
lighty_rnc_app_test / build	7m 8s
lighty_rnc_cluster_app_test / build	8m 26s
lighty_rcgnmi_app_test / build	6m 39s
	38m 18s

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