Change from BATT_VOLT_PIN to BATT2_VOLT_PIN.
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Willian Galvani <williangalvani@gmail.com>

Fix merge issues

Remove/comment off debug output pollution

PX4 Firmware plugin: First try to switch flight mode, then arm if successful - which is a lot safer than arming and then seeing if we can switch modes.

Firmwareplugin: Trim retry period to something that matches closer the users attention and is still long enough to allow for multiple heartbeats to pass through