Zoltan2: CoordinateModel refactor API

[mperrinel]

Coordinates model accepts MatrixAdapter, VectorAdapter, MeshAdapter, GraphAdapter but no IdentifierAdapter

[mperrinel]

After analysis. The following tasks have to be done in order to match the new Adapters API

• [ ] Add new private member variables

  Kokkos::View<gno_t *, device_t> kGids_;
  Kokkos::View<scalar_t **, device_t> kXyz_;
  Kokkos::View<scalar_t **, device_t> kWeights_;

• [ ] Update sharedConstructor private method in order to fill new member variables

// Host case
   typename Adapter::ConstIdsHostView kgids;
    ia->getIDsHostView(kgids);
   // getCoordinatesHostView, getWeightsHostView

// Device case 
   typename Adapter::ConstIdsDeviceView kgids;
   ia->getIDsDeviceView(kgids);
   // getCoordinatesDeviceView, getWeightsDeviceView

• [ ] Update getLocalNumCoordinates and getGlobalNumCoordinates methods
• [ ] Update test in TDD mode (CoordinateModel)
• [ ] Update documentation