The class hierachy with base  xNonLocalInfoGeneratorForKeysAndFcts is modifyed to store the data it build for each element in a data manager instead of using a raw AOMDtag.
    details :
    changes
    in  class xNonLocalInfoForKeysAndFcts
     -  member functions
    int getAllKeysFromSlavesAndFree(xValKey::ids_size_t phys, xSpace::femKeys * keys, xSpace::femKeys * other_master_keys);
    and femfemRelKeys& getCoefAndKeysForKey( const xValKey & key );
    are changed to :
    int getAllKeysFromSlavesAndFree(xValKey::ids_size_t phys, xSpace::femKeys * keys, xSpace::femKeys * other_master_keys) const;
    const femRelKeys& getCoefAndKeysForKey( const xValKey & key ) const;
    (These member functions do not modify the xNonLocalInfoForKeysAndFcts. It is changed to a const member function, so that it could be use in contant where the object is const.)

    in class xNonLocalInfoGeneratorForKeysAndFcts
    - virtual  member
    virtual unsigned int generateNonLocalInfoForKeysAndFcts(spacePtr_t  space, const int polynomial_order)=0;
    is changed to       virtual void generateNonLocalInfoForKeysAndFcts(spacePtr_t  space, const int polynomial_order)=0;
    rational : previously it returned the tag to recover the data xNonLocalInfoForKeysAndFcts associated to each entity.
    Now this data is stored internally in a datamanager. The tag do not exist any more nd is no longer returned.
    The data for one element can now be recover by calling the new const pure virtual  member function :
    virtual const xNonLocalInfoForKeysAndFcts * getNonLocalInfo(const AOMD::mEntity & e) const =0;
    - a virtual destructor is added.

    in class  xNonLocalInfoGeneratorForKeysAndFctsForHangingNode:
    constructor xNonLocalInfoGeneratorForKeysAndFctsForHangingNode(xMesh &mesh,unsigned int tag,  const DATAMANAGER < AOMD::mEntity *> &isHangingOn =  xMesh::get_const_is_hanging_on(), const DATAMANAGER < std::vector<AOMD::mEntity *> > &downGroup =xMesh::get_const_down_group(),  const DATAMANAGER < std::vector<AOMD::mEntity *> > &bndGroup= xMesh::get_const_bnd_group(), double thresold = 1.e-12);
    is replaced by
    xNonLocalInfoGeneratorForKeysAndFctsForHangingNode(xMesh &mesh, DATAMANAGER< xNonLocalInfoForKeysAndFcts * >& _nli_data, const DATAMANAGER < AOMD::mEntity *> &isHangingOn =  xMesh::get_const_is_hanging_on(), const DATAMANAGER < std::vector<AOMD::mEntity *> > &downGroup =xMesh::get_const_down_group(), const DATAMANAGER < std::vector<AOMD::mEntity *> > &bndGroup= xMesh::get_const_bnd_group(), double thresold = 1.e-12);
    Rational :  the previous constructor was used to force the created datas to be attached using an imposed tag. This is replaced by passing the data manager that will store the data.
    -a virtual destructor is added.
    The data are constructed on the current mesh for a given space by calling :
     void generateNonLocalInfoForKeysAndFcts(spacePtr_t  space, const int polynomial_order) override;
    - The data can be recovered using the override :
    const xNonLocalInfoForKeysAndFcts * getNonLocalInfo(const AOMD::mEntity & e) const override;

    class xNonLocalInfoGeneratorForKeysAndFctsForHangingNodeOldAndCurrent :
    This class is also modifyed to conform to the new base class.

    A xNonLocalInfoGeneratorForKeysAndFcts object pointer is used as an input for  xSpacePolynomialOctree based objects.
    This class hierachy as been modify to integrate the new interface.

    File xFEM/src/xAttachableNonLocalInfoForKeysAndFcts.h is removed from the repository since it is not used anymore. (it was used to define and access to xNonLocalInfoForKeysAnfFcts has a mAttachableData)

    Other minor change :
     header xAttachableVector.h remove from the include list in  xInterface/xOctree/src/InterfaceOctreeToAOMD.cc  since it is not used here anymore.

    deleted:    xFEM/src/xAttachableNonLocalInfoForKeysAndFcts.h
    modified:   xFEM/src/xNonLocalInfoForKeysAndFcts.cc
    modified:   xFEM/src/xNonLocalInfoForKeysAndFcts.h
    modified:   xFEM/src/xNonLocalInfoForKeysAndFcts_imp.h
    modified:   xFEM/src/xSpacePolynomial.cc
    modified:   xFEM/src/xSpacePolynomial.h
    modified:   xInterface/AOMD/CMakeLists.txt
    modified:   xInterface/xOctree/src/InterfaceOctreeToAOMD.cc