AP_DroneCAN: DNA Server: log duplicate nodes in CAND #35735

Job	Run time
build (stm32f7, chibios, 10)	4m 47s
build (stm32h7, chibios, 10)	4m 38s
build (fmuv2-plane, chibios, 10)	2m 50s
build (periph-build, chibios, 10)	4m 39s
build (iofirmware, chibios, 10)	1m 24s
build (CubeOrange-bootloader, chibios, 10)	51s
build (fmuv3-bootloader, chibios, 10)	53s
build (revo-bootloader, chibios, 10)	50s
build (stm32h7-debug, chibios, 10)	3m 32s
build (fmuv3, chibios, 10)	8m 40s
build (revo-mini, chibios, 10)	4m 1s
build (MatekF405-Wing, chibios, 10)	4m 17s
build (CubeOrange-ODID, chibios, 10)	4m 14s
build (CubeRedPrimary-bootloader, chibios, 10)	45s
build (configure-all, chibios, 10)	9m 42s
build (build-options-defaults-test, chibios, 10)	6m 22s
build (signing, chibios, 10)	3m 46s
build (CubeOrange-PPP, chibios, 10)	3m 10s
build (CubeOrange-SOHW, chibios, 10)	3m 1s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 14s
	1h 13m 36s

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