Revert persistence.conf changes, modify sqlite database to mimic legacy data

Author: Arkatufus

src/contrib/persistence/Akka.Persistence.Sqlite.Tests/data/Sqlite.CustomObject.db

@@ -115,6 +115,9 @@ akka.persistence {
         # Dispatcher for message replay.
         replay-dispatcher = "akka.persistence.dispatchers.default-replay-dispatcher"
 
+        # Default serializer used as manifest serializer when applicable and payload serializer when no specific binding overrides are specified
+        serializer = "json"
+        
         # Removed: used to be the Maximum size of a persistent message batch written to the journal.
         # Now this setting is without function, PersistentActor will write as many messages
         # as it has accumulated since the last write.
@@ -171,6 +174,8 @@ akka.persistence {
         # Dispatcher for the plugin actor.
         plugin-dispatcher = "akka.persistence.dispatchers.default-plugin-dispatcher"
 
+        # Default serializer used as manifest serializer when applicable and payload serializer when no specific binding overrides are specified
+        serializer = "json"
         circuit-breaker {
             max-failures = 5
             call-timeout = 20s