monitor: Catch timeout rise by ssl.SSLError

Additionally print exact exception message.

/reviewed-on nexedi/slapos.toolbox!56

slapos/monitor/monitor.py

@@ -217,8 +217,8 @@ class Monitoring(object):
         response = urllib2.urlopen(url, timeout=timeout)
     except urllib2.HTTPError:
       print "ERROR: Failed to get Monitor configuration file at %s " % url
-    except socket.timeout, e:
-      print "ERROR: Timeout while downloading monitor config at %s " % url
+    except (socket.timeout, ssl.SSLError) as e:
+      print "ERROR: Timeout with %r while downloading monitor config at %s " % (e, url)
     else:
       try:
         monitor_dict = json.loads(response.read())