Clover construction does not support anisotropy

[maddyscientist]

The clover construction in lib/clover_quda.cpp does not presently support anisotropic clover construction. To do this Fmunu should be constructed with an isotropic gauge field, and the anisotropy taken care of explicitly when multiplying in the clover coefficient. Presently there is a single clover coefficient, this needs to be make an array of coefficients, allowing us to include the anisotropy in explicitly as a linear factor.

The Chroma reference code is here: https://github.com/JeffersonLab/chroma/blob/master/lib/actions/ferm/linop/clover_term_qdp_w.h https://github.com/JeffersonLab/chroma/blob/master/lib/meas/glue/mesfield.cc (construction of Fmunu)

template<typename T, typename U>
  Real
  QDPCloverTermT<T,U>::getCloverCoeff(int mu, int nu) const 
  { 
    START_CODE();

    if( param.anisoParam.anisoP )  {
      if (mu==param.anisoParam.t_dir || nu == param.anisoParam.t_dir) { 
    return param.clovCoeffT;
      }
      else { 
    // Otherwise return the spatial coeff
    return param.clovCoeffR;
      }
    }
    else { 
      // If there is no anisotropy just return the spatial one, it will
      // be the same as the temporal one
      return param.clovCoeffR; 
    } 

    END_CODE();
  }

[maddyscientist]

Assigning this task to @weinbe2.