add example test scripts for orca.automl (intel#4836)

python/orca/dev/example/run-example-tests-pip-ray.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+clear_up () {
+    echo "Clearing up environment. Uninstalling BigDL"
+    pip uninstall -y bigdl-orca
+    pip uninstall -y bigdl-dllib
+    pip uninstall -y pyspark
+}
+
+execute_ray_test(){
+    echo "start example $1"
+    start=$(date "+%s")
+    python $2
+    exit_status=$?
+    if [ $exit_status -ne 0 ];
+    then
+        clear_up
+        echo "$1 failed"
+        exit $exit_status
+    fi
+    now=$(date "+%s")
+    return $((now-start))
+}
+
+execute_ray_test auto-estimator-pytorch "${BIGDL_ROOT}/python/orca/example/automl/autoestimator/autoestimator_pytorch.py --trials 5 --epochs 2"
+time1=$?
+
+if [ -f ${BIGDL_ROOT}/data/airline_14col.data ]
+then
+    echo "airline_14col.data already exists"
+else
+    wget -nv $FTP_URI/analytics-zoo-data/airline_14col.data -P ${BIGDL_ROOT}/data/
+fi
+
+execute_ray_test auto-xgboost-classifier "${BIGDL_ROOT}/python/orca/example/automl/autoxgboost/AutoXGBoostClassifier.py -p ${BIGDL_ROOT}/data/airline_14col.data"
+time2=$?
+
+if [ -f ${BIGDL_ROOT}/data/incd.csv ]
+then
+    echo "incd.csv already exists"
+else
+    wget -nv $FTP_URI/analytics-zoo-data/incd.csv -P ${BIGDL_ROOT}/data/
+fi
+
+execute_ray_test auto-xgboost-regressor "${BIGDL_ROOT}/python/orca/example/automl/autoxgboost/AutoXGBoostRegressor.py -p ${BIGDL_ROOT}/data/incd.csv"
+time3=$?
+
+echo "#1 auto-estimator-pytorch time used:$time1 seconds"
+echo "#2 auto-xgboost-classifier time used:$time2 seconds"
+echo "#3 auto-xgboost-regressor time used:$time3 seconds"
+
+clear_up