fix oauth time skew. actual implementation was returning 401 not 403.

This fixes (tested) bug 978127.  The server was actually returning a 401
not a 403.  As such, the fix here was insufficient.  This will now take
either of those 2 error codes.  I've also tested it by changing the clock
in the cloud-init upstart job with a stanza like below, and verifying
that we do see the problem and then it resolve itself:

  pre-start script
    offset="10 minutes ago"
    past=$(date -R --date "$offset")
    date --set "$past" &&
      echo ===== "set date to $past [$offset]" ===== ||
      echo ===== "failed to set date to $past [$offset]" ====
  end script

LP: #978127

1 files changed, 2 insertions, 2 deletions

diff --git a/cloudinit/sources/DataSourceMAAS.py b/cloudinit/sources/DataSourceMAAS.py
index ec52d775..e187aec9 100644
--- a/cloudinit/sources/DataSourceMAAS.py
+++ b/cloudinit/sources/DataSourceMAAS.py
@@ -145,10 +145,10 @@ class DataSourceMAAS(sources.DataSource):
 
     def _except_cb(self, msg, exception):
         if not (isinstance(exception, urllib2.HTTPError) and
-                exception.code == 403):
+                (exception.code == 403 or exception.code == 401)):
             return
         if 'date' not in exception.headers:
-            LOG.warn("date field not in 403 headers")
+            LOG.warn("date field not in %d headers" % exception.code)
             return
 
         date = exception.headers['date']