[NUI][API10] Fix some incorrect implements when we get Texture relative items

[NUI][API10] Fix some incorrect implements when we get Texture relative items

Since now we have a unified pattern to avoid memory leak problem
between NUI and Native side handle count problem,
Let we change some mis-implementated codes relative with Texture.

Signed-off-by: Eunki Hong <eunkiki.hong@samsung.com>