Stop double logging to the console

Stop double logging to the console

The code in nova for logging added an extra root handler to be
able to log messages to the console during log setup. This handler
was removed in the setup method. The common setup method no longer
removes this handler, so don't create it. Note that there may be
a small period before the logging setup is finished where messages
will not appear.

Fixes bug 1053512

Change-Id: I559cca8ffc2a33beff22025e42a9713487245980
(cherry picked from commit a1cbbe2e9e5d7a5ec55ec1197571cd68fcdbad15)