add paddle cloud run

example/cloud/before_hook.sh

 echo "Run before_hook.sh ..."
+../python27-gcc482/bin/python ../python27-gcc482/bin/pip install ./thirdparty/paddle_rec-0.0.2-py2-none-any.whl --index-url=http://pip.baidu.com/pypi/simple --trusted-host pip.baidu.com
 echo "End before_hook.sh ..."

example/cloud/job.sh

@@ -6,3 +6,5 @@
 ###################################################
 
 echo "heheda"
+
+python -m paddlerec.run -m paddlerec.models.rank.dnn -e cluster -r worker