tree e3186d133e7cb0fb40176c6ab5fd0758fb32386f
parent 10973fb725d498443ee7e21bb11a9ccbaab4701a
author zhufl <zhu.fanglei@zte.com.cn> 1508831300 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1508831300 +0800

Remove routers_client from manager._create_subnet

This is to:
1. remove routers_client from manager._create_subnet
   because routers_client is not used for creating subnet.
2. rename _create_subnet to create_subnet for it is used
   by several testcases.

Change-Id: I102c3b01abe0ae752196d27893d43e64acfb57a6