Add pytables recipe from defaults channel
Pytables recipe from the defaults channel.
Reason: The pytables packages from the defaults channel, for python 3.7, are not compatible with bob's version of hdf5 (1.10.6). There are compatible version for python 3.8 and 3.9, so it will be possible to drop this once we move to python 3.8+
Edited by Amir MOHAMMADI