[newarch] recycle (dealloc) dataloader instance

[grimmer0125]

There are some places where we new dataloader instances but forget to dealloc (DestroyObject).

1
void NewServerConnector::jsSendCommandSlot(const QString & sessionID, const QString & senderSession, const QString &cmd, const QString & parameter)

Carta::Data::DataLoader *m_dataLoader = objMan->createObjectCarta::Data::DataLoader();

2
QString Controller::saveImage( const QString& fileName ){

3
QString LayerData::_setFileName( const QString& fileName, bool * success ){

4
void Layer::_resetState( const Carta::State::StateInterface& restoreState ){