Set the default_log_levels to include keystoneclient

This creates a loggger for keystoneclient so we don't get:
"
No handlers could be found for logger "keystoneclient.middleware.auth_token"
"

bug 1152584
Signed-off-by: Angus Salkeld <asalkeld@redhat.com>

Change-Id: I72d4de37799956b33371826aae50d8ac1ee333b1
Merge "Set the default_log_levels to include keystoneclient"