OSBA function names

Some OSBA functions and the handle have incorrect names, e.g.:

• ivas_masa_ism_data_open() should be ivas_osba_data_open()
• ivas_masa_ism_data_close() should be ivas_osba_data_close()
• ivas_sba_ism_separate_object_renderer_open() could be merged into ivas_osba_data_open()
• hMasaIsmData should be hSbaIsmData and reduced in order to save RAM