If some visual attempt to atlas, they will use AtlasManager.
So there is no reason to keep atlas relative informations for
TextureInfo struct, what we are caching now.
+
This patch touch a lots of codes in texture-manager.
So, I also change something useless lvalue usages
Something like, const bool&
Change-Id: I6a83b75c8311377e2ab6d62d29c19864a21d7e79
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>