Merge pull request #592 from rxin/test.

SPARK-1088: Create a script for running tests so we can have version specific testing on Jenkins.

@pwendell

Author: Reynold Xin <rxin@apache.org>

Closes #592 and squashes the following commits:

be02359 [Reynold Xin] SPARK-1088: Create a script for running tests so we can have version specific testing on Jenkins.

dev/run-tests

+#!/usr/bin/env bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Go to the Spark project root directory
+FWDIR="$(cd `dirname $0`/..; pwd)"
+cd $FWDIR
+
+# Remove work directory
+rm -rf ./work
+
+# Fail fast
+set -e
+
+echo "========================================================================="
+echo "Running Scala style checks"
+echo "========================================================================="
+sbt/sbt clean scalastyle
+
+echo "========================================================================="
+echo "Running Spark unit tests"
+echo "========================================================================="
+sbt/sbt assembly test
+
+echo "========================================================================="
+echo "Running PySpark tests"
+echo "========================================================================="
+if [ -z "$PYSPARK_PYTHON" ]; then
+  export PYSPARK_PYTHON=/usr/local/bin/python2.7
+fi
+./python/run-tests