vdsm-reg: Fix closed log file descriptors

When calling createDaemon(), all file descriptors are closed, including
the file descriptors held by log handlers. This patch moves logging
configuration below the daemonization to make sure the file descriptors
stay open.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1150238
Change-Id: Ida11e61aea18fbb2990176889423d2c4b6292a09
Signed-off-by: Dima Kuznetsov <dkuznets@redhat.com>
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/34981
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/35120
Reviewed-by: Fabian Deutsch <fabiand@redhat.com>