Opt out of the service catalog

Set include_servce_catalog=False in Keystone's auth_token
example configuration. Swift does not use X-Service-Catalog
so there is no need to suffer its overhead. In addition,
service catalogs can be larger than max_header_size so this
change avoids a failure mode.

DocImpact
Relates to bug 1228317

Change-Id: If94531ee070e4a47cbd9b848d28e2313730bd3c0
Merge "Opt out of the service catalog"