[webapi] [XWALK-1214] Update tests for nacl

- Update 7 tests
- Add 1 tests
- Modify status designed to approved
- When click the “Cursor Type” optional, the window quits immediately in test Nacl_api_Mouse_Cursor
- When click the “TCP” optional, the window quits immediately in test Nacl_api_Socket
- Function Delete return undefined in test Nacl_api_Var_Dictionary

Impacted tests (approved): new 1, update 7, delete 0
Unit test Platform: Tizen IVI
Unit test result summary: pass 5, fail 1, block 2