Add return code for SetPersistentStorageSettingsRep

Author: jp-pino

protobuf_definitions/req_rep.proto

@@ -177,6 +177,7 @@ message SetPersistentStorageSettingsReq {
 
 // Response after setting persistent storage settings.
 message SetPersistentStorageSettingsRep {
+  bool success = 1; // If the persistent storage settings were set successfully.
 }
 
 // Request to get currently set persistent storage settings.
@@ -186,4 +187,4 @@ message GetPersistentStorageSettingsReq {
 // Response with the currently set persistent storage settings.
 message GetPersistentStorageSettingsRep {
   PersistentStorageSettings persistent_storage_settings = 1; // The currently set persistent storage settings.
-}
+}