gFEX Towers Decorator

With this MR, the decoration of decoded input gTowers with corresponding SuperCell and Tile tower information is implemented. The purpose is to enable a comparison between the decoded gTowers and decoded SuperCells and Tile Towers to make sure that the assignment is done correctly and to use it as a tool for monitoring. It makes use of maps containing the relevant information (which SC/Tile towers are assigned to which gTowers?). The files with the maps are currently located in a personal public area, however, a request has been submitted for moving those files into CVMFS (ATLASG-2469). Additionally, the masking of the SuperCells has been enabled in the gFex mapping simulation.