update sql import instruction in readme (#118)

README.md

@@ -70,11 +70,11 @@ virtualenv ./env
 ```
 cd /tmp/ && git clone https://github.com/open-falcon/falcon-plus.git 
 cd /tmp/falcon-plus/scripts/mysql/db_schema/
-mysql -h 127.0.0.1 -u root -p < uic-db-schema.sql
-mysql -h 127.0.0.1 -u root -p < portal-db-schema.sql
-mysql -h 127.0.0.1 -u root -p < graph-db-schema.sql
-mysql -h 127.0.0.1 -u root -p < dashboard-db-schema.sql
-mysql -h 127.0.0.1 -u root -p < alarms-db-schema.sql
+mysql -h 127.0.0.1 -u root -p < 1_uic-db-schema.sql
+mysql -h 127.0.0.1 -u root -p < 2_portal-db-schema.sql
+mysql -h 127.0.0.1 -u root -p < 3_graph-db-schema.sql
+mysql -h 127.0.0.1 -u root -p < 4_dashboard-db-schema.sql
+mysql -h 127.0.0.1 -u root -p < 5_alarms-db-schema.sql
 rm -rf /tmp/falcon-plus/
 ```