Use python3 print

Author: holdenk

dev/run-pip-tests

@@ -66,7 +66,7 @@ fi
 
 set -x
 # Determine which version of PySpark we are building for archive name
-PYSPARK_VERSION=$(python3 -c "exec(open('python/pyspark/version.py').read());print __version__")
+PYSPARK_VERSION=$(python3 -c "exec(open('python/pyspark/version.py').read());print(__version__)")
 PYSPARK_DIST="$FWDIR/python/dist/pyspark-$PYSPARK_VERSION.tar.gz"
 # The pip install options we use for all the pip commands
 PIP_OPTIONS="--upgrade --no-cache-dir --force-reinstall "