Merge pull request #714 from adatao/master

[BUGFIX]  Fix for sbt/sbt script SPARK_HOME setting

sbt/sbt

@@ -22,7 +22,7 @@ if [ "$MESOS_HOME" != "" ]; then
   EXTRA_ARGS="-Djava.library.path=$MESOS_HOME/lib/java"
 fi
 
-export SPARK_HOME=$(cd "$(dirname $0)/.."; pwd)
+export SPARK_HOME=$(cd "$(dirname $0)/.." 2>&1 >/dev/null ; pwd)
 export SPARK_TESTING=1  # To put test classes on classpath
 
 java -Xmx1200m -XX:MaxPermSize=350m -XX:ReservedCodeCacheSize=128m $EXTRA_ARGS -jar $SPARK_HOME/sbt/sbt-launch-*.jar "$@"