TorManager: escalate log error for Tor auth

This errorr is fatal for Tor usage (on Linux). Let's make escalate
it. Also see the previous commit, without which, this error doesn't
even get printed at all.

src/Tor/TorManager.py

@@ -213,7 +213,7 @@ class TorManager(object):
         except Exception, err:
             self.conn = None
             self.setStatus(u"Error (%s)" % str(err).decode("utf8", "ignore"))
-            self.log.warning(u"Tor controller connect error: %s" % Debug.formatException(str(err).decode("utf8", "ignore")))
+            self.log.error(u"Tor controller connect error: %s" % Debug.formatException(str(err).decode("utf8", "ignore")))
             self.enabled = False
         return self.conn