Gt update for mva and hcal

Updated global tags containing the E/gamma regression weights and pre-IDs. The code should be in the release but switched off in the default configuration.
Added also a new global tag for 50ns PostLS1 simulation accessible with autoCond label upgradePLS150ns. The only difference between the 25ns and the 50ns global tags are the L1 RPC configurations of HSCP triggers. The HSCP trigger are switched off for 25ns and are active for the 50ns.