Currently we log only the success or failure of shared lib load operations in HS
(by calling Events::log_dll_message).
Adding log messages for load attempts would help us in a number of cases :
- give timestamps before AND after the load operation
- log in hs_err file shared lib loads leading to crashes (there we do not see currently the success or failure of the dlopen operation)

( Optionally we could also add the lib size to the event logging, which helps us to identify lib versions in some scenarios )