DELTA_DFCM_NNN50 can not bypass pins A4, A5 in AnalogIn test case

[TsungtaWu]

Currently, pins A4 and A5 of DELTA_DFCM_NNN50 are used for external RC circuit.
While doing CI test, AnalogIn.cpp test throughout A0 to A5 by default result in ERROR on DELTA_DFCM_NNN50
Could you create a option said AIN_4_OUT and AIN_5_OUT in order to override in mbed_app.json?

[BlackstoneEngineering]

@TsungtaWu Currently there is no way around this as the CI Test shield assumes strict adherance to the Arduino R3 spec. We will be updating the CI Test Shield tests soon to allow for behaviour such as this. For now this counts as a failure for the CI Test Shield tests. To bypass this you will need approval from the your partner manager that this error is acceptable. They will likely need to manually modify the Analog In test to only use A0-A3 and re-run. On the platform page for your board you will need to make a note of this and explicitly call out this issue in the pinout diagram.

@mray19027 @samchuarm