Add an on-demand fixup of the NM connection

[skorobogatydmitry]

I faced an issue using the script. My NM set connection method to shared for some reason. The change sets method to auto if needed and possible.

Error I had

Discovered: enp4s0f4u1.
Using enp4s0f4u1 to discover the GOPRO_IP.
Found 10.42.0.1
To control the GoPro, we need to contact another interface (GOPRO_IP ending with .51).. Adapting internally..
Now using this GOPRO_IP internally: 10.42.0.51
Error while starting the Webcam mode. # TODO Useful message.

First output of the patched script

Discovered: enp4s0f4u1.
NetworkManager's connection method is not auto, setting ...
Connection 'Wired connection 1' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/25)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/26)
Connectio method is set to auto.
Using enp4s0f4u1 to discover the GOPRO_IP.
Found 172.28.103.54

Second output of the patched script

Discovered: enp4s0f4u1.
NetworkManager's connection method is auto.
Using enp4s0f4u1 to discover the GOPRO_IP.