Merge branch 'issue/quadrature_rules_ct' into 'master'

ref:core/dune-geometry

### Summary

changed value type to double in vector and matrix in eigenvalue computations
in JacobiNQuadratureRule1D

### Details

When instantiating JacobiNQuadratureRule1D with ct=float, the function
DynamicMatrixHelp::eigenValuesNonSym is not found since float and double are
mixed in the argument types. The reason is that the matrix was filled with ct
and the vector was filled with complex<double>.

The bug is introduced in [!127]

See merge request [!130]

  [!127]: gitlab.dune-project.org/NoneNone/merge_requests/127
  [!130]: gitlab.dune-project.org/core/dune-geometry/merge_requests/130