[NbtkTextureCache] Don't set the quality using ClutterTexture
[NbtkTextureCache] Don't set the quality using ClutterTexture

Set the cogl texture filters to the same as the default values
for ClutterTexture. This prevents ClutterTexture from
re-creating the texture.

pwithnall/mx,pwithnall/mx,clutter-project/mx,clutter-project/mx,pwithnall/mx,clutter-project/mx,jonnylamb/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,jonnylamb/mx,pwithnall/mx