LogProcessor fails first attempt to use it's InternalProxy

[Travis W Kiel]

The swift.stats.LogProcessor uses a wrapped method as its internal_proxy property. On first access it creates the InternalProxy object and stores it as _internal_proxy, yet it does not return it. This causes swift-log-stats-collector to throw an exception trying to use None as its proxy; it then hangs up.

LogProcessor should be updated to also return the object in the IF block,

    @property
    def internal_proxy(self):
        if self._internal_proxy is None:
            #### proxy instantiation code ###
            return self._internal_proxy
        else:
            return self._internal_proxy