Updated openstack/openstack
Project: openstack/oslo-incubator  4d17bdc499300aeb50c1b3c53241a4918e4a4581

Add ConnectionError exception

Declare ConnectionRefused as subclass of ConnectionError
ConnectionRefused is actually special case of ConnectionError

Partial-Bug: #1396570

Change-Id: Ibb0189da5c88498569ea90eb85efd9be493c197a