updated sharpmapserver's OL version to 2.12
updated sharpmapserver's OL version to 2.12

git-tfs-id: [https://tfs.codeplex.com/tfs/TFS01]$/SharpMap/Trunk;C99154

SharpMap/SharpMap,SharpMap/SharpMap,nhvu1988/SharpMap,nhvu1988/SharpMap