Regression for in-memory pipelnes for some specific applications

The resolution of #19 (closed) has introduced a regression, now the following fails:

import pyotb
xs = pyotb.OpticalCalibration('some_4bands_raster.tif')

res = xs + 1
res.write('tmp.tif')

For several apps, full in-memory pipelines don't work anymore whereas they were working with pyotb < 1.4.0

Known list of non-working apps: