Update the adaptive Lagrange kernel to use the new data organisation

 - Change FMM operators signature to take advantage of the new
   layout. The operators only take as parameters the data they may need
   instead of the whole cell. For instance (simplified):

   void M2M(CellClass* parent, CellClass** children);

   becomes

   void M2M(multipole_t*  parent_m,    symbolic_data_t* parent_s,
            multipole_t** children_ms, symbolic_data_t* children_ss);

Src/Adaptive/new/FAdaptUnifKernel.hpp

@@ -111,7 +111,8 @@ public:
     template<class SymbolicData>
     void P2L(typename CellClass::local_expansion_t* const local,
              const SymbolicData * const symb,
-             const ContainerClass* const particles)
+             const ContainerClass* const particles,
+             const SymbolicData * const /*source_symb*/)
     {
         using ComputeClass = typename ComputeClassDescriptor<FReal>::type;
         constexpr std::size_t FRealCount = ComputeClassDescriptor<FReal>::count;
@@ -187,7 +188,8 @@ public:
     template<class SymbolicData>
     void M2P(const typename CellClass::multipole_t* const pole,
              const SymbolicData* const symb,
-             ContainerClass* const particles)
+             ContainerClass* const particles,
+             const SymbolicData * const /*target_symb*/)
     {
         using ComputeClass = typename ComputeClassDescriptor<FReal>::type;
         constexpr std::size_t FRealCount = ComputeClassDescriptor<FReal>::count;
@@ -249,27 +251,6 @@ public:
 
         }// NVALS
     }
-
-
-    // Previous interface starts here ////////////////////////////////
-
-    /**
-     * \brief Node symbolic data fill-in structure for compatibility with older interface
-     */
-    struct CellData {
-        std::size_t depth;
-        std::size_t m_idx;
-        std::size_t getLevel() const noexcept {
-            return depth;
-        }
-        std::size_t getMortonIndex() const noexcept {
-            return m_idx;
-        }
-        FTreeCoordinate getCoordinate() const noexcept {
-            return FTreeCoordinate(this->m_idx);
-        }
-    };
-
 };