Updated openstack/openstack
Project: openstack/nova  078951411964fbe986dd2a98f623b4c3dca1843c

Downgrade some exception LOG messages in the ec2 API

Downgrades some LOG.exception messages to more appropriate error
or debug level instead. Tracebacks should only be produced where
they are really necessary. In two of the cases the error path is entirely
expected as a result from user error and should therefore only be
logged at debug level.

Change-Id: Ib8321836c622a30c37c97fa971cb9fcf406bd2f1