[ISSUE #5311] less concurrency #11328

Job	Run time
build (shenyu-integrated-test-apache-dubbo)	12m 8s
build (shenyu-integrated-test-grpc)	13m 7s
build (shenyu-integrated-test-http)	14m 6s
build (shenyu-integrated-test-https)	12m 57s
build (shenyu-integrated-test-motan)	13m 27s
build (shenyu-integrated-test-spring-cloud)	13m 59s
build (shenyu-integrated-test-sofa)	12m 0s
build (shenyu-integrated-test-websocket)	12m 45s
build (shenyu-integrated-test-rewrite)	12m 41s
build (shenyu-integrated-test-combination)	15m 44s
build (shenyu-integrated-test-sdk-apache-dubbo)	14m 39s
build (shenyu-integrated-test-sdk-http)	13m 2s
	2h 40m 35s

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