Download folder synchronize folder operation

Needs a different constructor:

```public SyncFolderOpertion(String remotePath, Account account, long currentSyncTime)```

Specially important: do not pass ```OCfFile``` as a parameter, do not pass ```FileDataStorageManager``` as a parameter. 

If the operation really needs it, passing ```Context``` as a parameter may be good for the moment.

The rest of the parameters should go out without no problem, but removing the conditions they handle.