Unable to subscribe for ZMQ messages after the move to msqg

[blue-genie]

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Problem description

The move from cereal to msgq, and changes performed in msgq at that time, seems to have broken the streaming functionality in PJ.

Steps to reproduce (important)

• start ./cereal/messaging/bridge on c3x
• start PJ with the command ZMQ=1 ./juggle.py --stream
• in PJ click on Start under Cereal Subscriber, provide the IP of the c3x, and pick the right DBC file.
• Note that no messages are received.

#Root Cause:

Method static int get_port(std::string endpoint) { in messaging/impl_zmq.cc changed and calculates the endpoint port in a different way.

commaai/msgq@6d2cc6e#diff-f1d0983453654eb5af781df8745548f20a33103f40c30cd502d2593997954085R11

#Hackish solution

• After the submodules are pulled update the logic in the get_port method to the new logic and rebuild PJ - I used build.sh to rebuild.
• After build copy libDataStreamCereal.so from PlotJuggler/build/bin/ to openpilot/tools/plotjuggler/bin/
• Follow the steps from Steps to reproduce and note that now the messages are streamed to PJ.