exceptions: don't log error the lookup method errors. This happens so often we spam

the logs with errors , while it's simply commit not found. Other backends don't report this anyway exception HG.

rhodecode/lib/vcs/exceptions.py

@@ -205,7 +205,7 b' def map_vcs_exceptions(func):'
                     args = e.args
                 else:
                     args = [__traceback_info__ or 'unhandledException']
-                if __traceback_info__ and kind != 'unhandled':
+                if __traceback_info__ and kind not in ['unhandled', 'lookup']:
                     # for other than unhandled errors also log the traceback
                     # can be usefull for debugging
                     log.error(__traceback_info__)