Remove duplicate debug option from keystone-all

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
Merge "Remove duplicate debug option from keystone-all"
Merge branch 'master' of github.com:openstack-dev/devstack