Deprecate MovingLeastSquaresOMP

[SergioRAgostinho]

After C++14 migration remember to deprecate MovingLeastSquaresOMP.

pcl/surface/include/pcl/surface/mls.h

Lines 751 to 768 in 9467b94

	/** \brief MovingLeastSquaresOMP implementation has been merged into MovingLeastSquares for better maintainability.
	* \note Keeping this empty child class for backwards compatibility.
	* \author Robert Huitl
	* \ingroup surface
	*/
	template <typename PointInT, typename PointOutT>
	class MovingLeastSquaresOMP : public MovingLeastSquares<PointInT, PointOutT>
	{
	public:
	/** \brief Constructor for parallelized Moving Least Squares
	* \param threads the maximum number of hardware threads to use (0 sets the value to 1)
	*/
	MovingLeastSquaresOMP (unsigned int threads = 1)
	{
	this->setNumberOfThreads (threads);
	}
	};
	}