modify readme

Author: Wangpan

generate_sample/README.txt

@@ -1,5 +1,6 @@
 Generate config file guide:
-1. pip install oslo.config and oslo.log
-2. Execute the following command in the project root directory:
+1. copy files in this dir to your project root dir
+2. pip install oslo.config and oslo.log
+3. execute the following command in the project root dir:
 
 bash generate_sample.sh -p $PROJECTNAME -b . -o etc/$PROJECTNAME