Change the order of CLASSPATH.

spark-class

@@ -124,7 +124,7 @@ fi
 
 # Compute classpath using external script
 CLASSPATH=`$FWDIR/bin/compute-classpath.sh`
-CLASSPATH="$SPARK_TOOLS_JAR:$CLASSPATH"
+CLASSPATH="$CLASSPATH:$SPARK_TOOLS_JAR"
 export CLASSPATH
 
 if [ "$SPARK_PRINT_LAUNCH_COMMAND" == "1" ]; then

spark-class2.cmd

@@ -75,7 +75,7 @@ rem Compute classpath using external script
 set DONT_PRINT_CLASSPATH=1
 call "%FWDIR%bin\compute-classpath.cmd"
 set DONT_PRINT_CLASSPATH=0
-set CLASSPATH=%SPARK_TOOLS_JAR%;%CLASSPATH%
+set CLASSPATH=%CLASSPATH%;%SPARK_TOOLS_JAR%
 
 rem Figure out where java is.
 set RUNNER=java