Sensor status is never published via MQTT if board starts and MQTT server is not available during startup

[adamoferro]

A provisioned board starts and correctly connects to WiFi when the MQTT server is not available.
The board continuously shows the message "gn_main: grownode startup sequence code: 4" and periodically also some MQTT errors.
This behavior is ok and expected.

At a certain point the MQTT server becomes available.

The board subscribes to "general" topics but it never starts sending sensor status and keeps showing the aforementioned message, and no MQTT errors.

Example of output after MQTT server comes back online:

I (58451) gn_main: grownode startup sequence code: 4
I (59451) gn_main: grownode startup sequence code: 4
D (60131) gn_mqtt_protocol: Event dispatched from event loop base=MQTT_EVENTS, event_id=7
D (60131) gn_mqtt_protocol: Other event id:7
D (60291) gn_mqtt_protocol: Event dispatched from event loop base=MQTT_EVENTS, event_id=1
D (60291) gn_mqtt_protocol: MQTT_EVENT_CONNECTED
D (60291) gn_mqtt_protocol: subscribing default topic /grownode/test/cmd, msg_id=61933
D (60301) gn_mqtt_protocol: sent publish successful, msg_id=0, topic=/grownode/test/sts, payload={"msgtype":"online"}
D (60311) gn_mqtt_protocol: Event dispatched from event loop base=MQTT_EVENTS, event_id=3
D (60321) gn_mqtt_protocol: MQTT_EVENT_SUBSCRIBED, msg_id=61933
I (60451) gn_main: grownode startup sequence code: 4
I (61451) gn_main: grownode startup sequence code: 4
I (62451) gn_main: grownode startup sequence code: 4
I (63451) gn_main: grownode startup sequence code: 4
I (64451) gn_main: grownode startup sequence code: 4
I (65451) gn_main: grownode startup sequence code: 4
I (66451) gn_main: grownode startup sequence code: 4
I (67451) gn_main: grownode startup sequence code: 4
I (68451) gn_main: grownode startup sequence code: 4
I (69451) gn_main: grownode startup sequence code: 4
I (70451) gn_main: grownode startup sequence code: 4
I (71451) gn_main: grownode startup sequence code: 4
I (72451) gn_main: grownode startup sequence code: 4
I (73451) gn_main: grownode startup sequence code: 4
I (74451) gn_main: grownode startup sequence code: 4
I (75451) gn_main: grownode startup sequence code: 4
I (76451) gn_main: grownode startup sequence code: 4
I (77451) gn_main: grownode startup sequence code: 4
I (78451) gn_main: grownode startup sequence code: 4
I (79451) gn_main: grownode startup sequence code: 4
I (80451) gn_main: grownode startup sequence code: 4
I (81451) gn_main: grownode startup sequence code: 4
I (82451) gn_main: grownode startup sequence code: 4
I (83451) gn_main: grownode startup sequence code: 4
I (84451) gn_main: grownode startup sequence code: 4
I (85451) gn_main: grownode startup sequence code: 4
I (86451) gn_main: grownode startup sequence code: 4
I (87451) gn_main: grownode startup sequence code: 4
I (88451) gn_main: grownode startup sequence code: 4
I (89451) gn_main: grownode startup sequence code: 4

[ogghst]

solved in commit 9f8167a