Removed journalPrefix as command line paramter during journal
rotation, deferring to db.config values, for Windows SDP.
Removed explicit specification of journalPrefix as a command line
argument to 'p4d -jj' command. Specifying the prefix is redundant
as journalPrefix values are defined for the master server and
any/all replicas/edge servers in db.config, and db.config is the
One Source of Truth for journalPrefix.