MuonSelectorTools throw exceptions if a property cannot be retrieved & misc

Hi,

in the general sense this MR is a sweep of !50401 (merged) to the master branch & developments to move forward with ATLASG-1622

• Use the Gaudi::Property mechanism to declare all Tool properties & reindentation (1. commit)
• Add helper methods to retrieve particle summary values & the muon parameters. If the parameters cannot be retrieved an exception is thrown
• Add helper methods to calculate the q over p significance & rho prime
• Summary values were retrieved at various places. The retrieval is now centralized in the hitSummary struct. The filling happens at a central place
• Add the DisablePtCuts as a expert property. All pt dependent cuts are essentially switched off it is turned on. This will help us to move forward with ATLASG-1622. An algorithm to implement a proper track skimming is currently in preparation

Tagging: @gabarone, @mvanadia, @yoyamagu