Redirect logging to /var/log/swift/swift.log
    
    The thorniest problem with making Swift log like any other OpenStack
    component is that it uses syslog. Therefore, it must use one of the
    pre-defined logging facilities, and we cannot be sure that there is
    no conflict. We're taking this risk because the current situation is
    worse. See the bug 997983 for the long deliberation.
    
    Resolves: rhbz#997983