[SPARK-6435] spark-shell --jars option does not add all jars to classpath

Modified to accept multiple jars in spark-shell.cmd.

Author: tsudukim

bin/spark-class2.cmd

@@ -64,7 +64,10 @@ if not "x%JAVA_HOME%"=="x" set RUNNER=%JAVA_HOME%\bin\java
 
 rem The launcher library prints the command to be executed in a single line suitable for being
 rem executed by the batch interpreter. So read all the output of the launcher into a variable.
-for /f "tokens=*" %%i in ('cmd /C ""%RUNNER%" -cp %LAUNCHER_CP% org.apache.spark.launcher.Main %*"') do (
+set LAUNCHER_OUTPUT=%temp%\spark-class-launcher-output.txt
+"%RUNNER%" -cp %LAUNCHER_CP% org.apache.spark.launcher.Main %* > %LAUNCHER_OUTPUT%
+for /f "tokens=*" %%i in (%LAUNCHER_OUTPUT%) do (
   set SPARK_CMD=%%i
 )
+del %LAUNCHER_OUTPUT%
 %SPARK_CMD%