tests-api-analogin : value read max value limitation

[jeromecoutant]

Hi

Here is tests-api-analogin scenario :
// As you turn more pins on the voltage on the ain pin will go up.

Note that measurement value is between 0 and VREF+, i.e. 3.3 V in most of ST boards.
My issue is with DISCO_L496AG board : max value is 2.5V

ci-test-shield/TESTS/API/AnalogIn/AnalogIn.cpp

Line 35 in befdcc2

BusInOut outputs(dout_pin1,dout_pin2,dout_pin3,dout_pin4,dout_pin5);

Is it possible to limit the BusOut with 4 pins ?
Test remains quite the same, and it seems that 4 pins, turned on, is OK (below 2.5V) ?

Thx

Reference: ARMmbed/mbed-os#8168