wu.chunyang 0e728eee7e update some documents about the keystone "API v2.0" ...

As keystone has removed identity API v2.0,so update some related  docs
for more information,see [0]

Change-Id: I2fcb090a80ed073241ecb4ab1d0778926a69b153

2018-05-12 23:32:12 +08:00

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update some documents about the keystone "API v2.0"

2018-05-12 23:32:12 +08:00