SPARK-1007: spark-class2.cmd should change SCALA_VERSION to be 2.10

spark-class2.cmd

@@ -17,7 +17,7 @@ rem See the License for the specific language governing permissions and
 rem limitations under the License.
 rem
 
-set SCALA_VERSION=2.9.3
+set SCALA_VERSION=2.10
 
 rem Figure out where the Spark framework is installed
 set FWDIR=%~dp0