Test change only: update SN of active instance 15 board.
Switched boards, not that it seems to have made any difference to the reliability of nRF52840 testing.
@@ -129,7 +129,7 @@ __DEFAULT_SETTINGS["CONNECTION_INSTANCE_13" + __SETTINGS_POSTFIX_AGENT_SPECIFIC]
__DEFAULT_SETTINGS["CONNECTION_INSTANCE_14" + __SETTINGS_POSTFIX_AGENT_SPECIFIC] = \
{"serial_port": "/dev/stlink_v2_1", "debugger":"066EFF515551678367072825"}
__DEFAULT_SETTINGS["CONNECTION_INSTANCE_15" + __SETTINGS_POSTFIX_AGENT_SPECIFIC] = \
- {"serial_port": "/dev/segger_jlink_nrf52840", "debugger":"683920969"}
+ {"serial_port": "/dev/segger_jlink_nrf52840", "debugger":"683696270"}
__DEFAULT_SETTINGS["CONNECTION_INSTANCE_16" + __SETTINGS_POSTFIX_AGENT_SPECIFIC] = \
{"serial_port": "/dev/stlink_v2_1", "debugger": "0668FF383032534E43184418"}
__DEFAULT_SETTINGS["CONNECTION_INSTANCE_17" + __SETTINGS_POSTFIX_AGENT_SPECIFIC] = \
