fix bug of runtest.sh when run ut python

tests/ut/runtest.sh

@@ -16,21 +16,26 @@
 
 set -e
 
-CURRPATH=$(cd "$(dirname $0)"; pwd)
+CURR_PATH=$(cd "$(dirname $0)"; pwd)
 
 if [ $# -gt 0 ]; then
     if [ $1 == "python" ]; then
-        echo "run python ut"
-        bash ${CURRPATH}/ut/python/runtest.sh $2
+        echo "Run ut python."
+        cd ${CURR_PATH}/python
+        bash runtest.sh $2
     elif [ $1 == "cpp" ]; then
-        echo "run cpp ut"
-        bash ${CURRPATH}/ut/cpp/runtest.sh
+        echo "Run ut cpp."
+        cd ${CURR_PATH}/cpp
+        bash runtest.sh
     fi
 else
-    echo "run all ut"
-    # 1.run python testcases
-    bash ${CURRPATH}/ut/python/runtest.sh $2
+    echo "Run all ut."
+    
+    # Run python testcases
+    cd ${CURR_PATH}/python
+    bash runtest.sh $2
 
-    # 2.run c++ ut testcases
-    bash ${CURRPATH}/ut/cpp/runtest.sh
-fi
+    # Run cpp testcases
+    cd ${CURR_PATH}/cpp
+    bash runtest.sh
+fi