liyanhang b33512f0d8 Update etc/keystone.conf.sample
If we generate keystone.conf using "tox -e genconfig",
some options are different from the sample file.
So update it.

Change-Id: I7f20338d2fab60f692dc58ca731a6a56279224fe
2016-08-05 14:46:43 +00:00
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