Builds failing because of verify process error

Created by: voisey

Builds for https://github.com/NNPDF/nnpdf/pull/645 and https://github.com/NNPDF/nnpdf/pull/647 seem to be failing because of the following error:

filename = '/Users/travis/miniconda3/conda-bld/nnpdf_1581534117931/_test_env_placehold_placehold_placehold_placehold_placehold_pl...hold_placehold_placehold_placehold_placehol/share/NNPDF/data/commondata/DATA_ATLAS_SINGLETOP_TCH_DIFF_7TEV_TBAR_PT.dat'
sysfile = '/Users/travis/miniconda3/conda-bld/nnpdf_1581534117931/_test_env_placehold_placehold_placehold_placehold_placehold_pl...hold_placehold_placehol/share/NNPDF/data/commondata/systypes/SYSTYPE_ATLAS_SINGLETOP_TCH_DIFF_7TEV_TBAR_PT_DEFAULT.dat'
    def ReadFile(filename, sysfile):
        """
        ReadFile(std::string const & filename, std::string const & sysfile) -> CommonData
    
        Parameters
        ----------
        filename: std::string const &
        sysfile: std::string const &
    
        """
>       return _nnpdf.CommonData_ReadFile(filename, sysfile)
E       RuntimeError: CommonData::VerifyProc: process  is unsupported.

This problem was found in https://github.com/NNPDF/nnpdf/pull/632 but @enocera addressed it such that the build then passed. At first glance it's strange because the process defined for ATLAS_SINGLETOP_TCH_DIFF_7TEV_TBAR_PT is HQP_PTQ, which is defined in the list of processes in libnnpdf/src/commondata.cc.