[ISSUE #5311] less concurrency #11340

Job	Run time
build (shenyu-integrated-test-apache-dubbo)	12m 48s
build (shenyu-integrated-test-grpc)	12m 48s
build (shenyu-integrated-test-http)	14m 17s
build (shenyu-integrated-test-https)	12m 53s
build (shenyu-integrated-test-motan)	13m 27s
build (shenyu-integrated-test-spring-cloud)	13m 32s
build (shenyu-integrated-test-sofa)	12m 53s
build (shenyu-integrated-test-websocket)	13m 47s
build (shenyu-integrated-test-rewrite)	13m 31s
build (shenyu-integrated-test-combination)	15m 19s
build (shenyu-integrated-test-sdk-apache-dubbo)	15m 12s
build (shenyu-integrated-test-sdk-http)	12m 57s
	2h 43m 24s

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