Added Source linker which takes multiple hit collections of tracker hits

Note that there is an "s" in the name of the new algo.

JugReco/src/components/TrackerSourceLinker.cpp

-// This file is part of the Acts project.
-//
-// Copyright (C) 2019 CERN for the benefit of the Acts project
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this
-// file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-//#include "HitSmearing.hpp"
-
 #include "JugReco/GeometryContainers.hpp"
 
 // Gaudi