The keystone server was started with the options like
keystone-all ... -d --debug ...
The -d and --debug options are the same so one of them is
redundant.
This will make it less confusing if someone removes --debug and
thinks that debug is off, but debug is still on because they
didn't notice there was an extra -d.
Change-Id: I1ac977e6b12f1cc44f02b636c1bfb5c115b5b3e4