gtest: Bump up to 3ms min-delay for CI
gtest: Bump up to 3ms min-delay for CI

Much less stringent unit test for min timing delay.

Signed-off-by: Noel Eck <1e36ab6ededef40f3f16bdbc1b09eee72c5d08cf@intel.com>

intel-iot-devkit/upm,Propanu/upm,stefan-andritoiu/upm,intel-iot-devkit/upm,g-vidal/upm,g-vidal/upm,stefan-andritoiu/upm,Propanu/upm,g-vidal/upm,Propanu/upm,stefan-andritoiu/upm,Propanu/upm,intel-iot-devkit/upm,stefan-andritoiu/upm,intel-iot-devkit/upm,Propanu/upm,g-vidal/upm,Propanu/upm,stefan-andritoiu/upm,intel-iot-devkit/upm,stefan-andritoiu/upm,intel-iot-devkit/upm,g-vidal/upm,g-vidal/upm