rgw: raise log levels for common radosgw-admin errors

rgw: raise log levels for common radosgw-admin errors

Currently while running radosgw-admin command we see these messages thrown at
the endusers since debug level is set to 0:

2016-08-02 14:48:28.687251 7f9e630639c0  0 Cannot find zone
id=7a2a89b9-4f5e-4f60-a29e-451ac9acc5a8 (name=us-west), switching to local
zonegroup configuration
2016-08-02 14:48:35.742185 7f9e630639c0  0 error read_lastest_epoch
.rgw.root:periods.a3db7884-2445-4bab-a165-6730f8573b8f:staging.latest_epoch

Raising the log level to 1.

Fixes: http://tracker.ceph.com/issues/16935
Signed-off-by: Shilpa Jagannath <smanjara@redhat.com>
(cherry picked from commit 8ff2b8e71abd34648c8eefb6b158ae5de46bd709)