Missing /data/mender/mender.conf when upgrading to warrior

Hi,
I tried and ended with this problem -> Yocto 2.7 - Warrior support

    "RootfsPartA": "/dev/mmcblk0p2",
    "RootfsPartB": "/dev/mmcblk0p3"

is missing (/etc/mender/mender.conf)

You can take a look at this thread Issues with upgrading from 1.7.0 to 2.1.0 (I just created this thread, because this discussion was in a unrelated topic)