Several harmoniser issues

[MDijsselhof]

• NeuroHarmonize
  • SITE issues,
  • SOLUTION can be fixed with the following code in harmonizers.py after line 844 : covariates_data["SITE"] = all_data[self.site_indicator]
• OPNested ComBat
  • anderson_ksamp error
  • SOLUTION Needs more than one feature
• RELIEF
  • rpy2 to be installed
  • denoiseR install in driver
  • SOLUTION by creating a conda environment with r-essentials | r-base | r-denoiseR and also install rpy2 using pip install rpy2
  • Works with more than one feature