fix rtc listen port conflict for origin2/3 conf #3604

Job	Run time
multiple-arch-aarch64	22m 37s
utest-regression-blackbox-test	9m 41s
cygwin64-cache	1m 54s
multiple-arch-armv7	22m 32s
fast	1s
cygwin64	14m 52s
build-cross-arm	5m 24s
build-cross-aarch64	5m 3s
build-centos7	5m 6s
build-ubuntu16	3m 18s
build-ubuntu18	3m 3s
build-ubuntu20	3m 37s
coverage	3m 46s
multiple-arch-amd64	2m 18s
test-done	1s
	1h 43m 13s

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