Remove dependency from db.hostInfo()

Hi, I was testing a mongodb Atlas shared cluster for genieacs. I found this depends on db.hostInfo() command, which is not allowed on Atlas shared clusters, Looking at the code, I see there is a single usage of that command here. Could we get db time offset computed in a different way such that this command dependency is removed?

Oh, I would also like to inform you that current clusterTime is also reported in the “not Allowed” Error message… so this is quite of LOL

-LuKe