[Ceilometer/Heat]: Evaluation of autoscaling related alarms is failing

This problem occurs with Havana version of Ceilometer/Heat.

The following patch has been taken into use so that the alarm info can be successfully inserted to ceilometer DB during heat stack create: https://review.openstack.org/#/c/45076/

Autoscaling groups are in use in a template (please see used template in attachment). Stack creation is successful and the VM instance is running ok, cpu_util metrics are inserted and visible in ceilometer DB. However, after stack creation following errors are visible in log files (more details in attachment):

ceilometer-alarm-singleton:
======================
2013-09-11 10:16:28.074 5326 INFO ceilometer.alarm.threshold_evaluation [-] initiating evaluation cycle on 3 alarms
2013-09-11 10:16:28.108 5326 ERROR ceilometer.alarm.threshold_evaluation [-] alarm stats retrieval failed
...
2013-09-11 10:16:28.108 5326 TRACE ceilometer.alarm.threshold_evaluation File "/opt/stack/python-ceilometerclient/ceilometerclient/v2/statistics.py", line 29, in list
2013-09-11 10:16:28.108 5326 TRACE ceilometer.alarm.threshold_evaluation '/v2/meters/' + meter_name + '/statistics',
2013-09-11 10:16:28.108 5326 TRACE ceilometer.alarm.threshold_evaluation TypeError: cannot concatenate 'str' and 'NoneType' objects

ceilometer-api:
===============
2013-09-11 10:16:28.221 4500 ERROR wsme.api [-] Server-side error: "metaquery not implemented". Detail:
Traceback (most recent call last):

  File "/usr/local/lib/python2.7/dist-packages/wsmeext/pecan.py", line 70, in callfunction
    result = f(self, *args, **kwargs)

  File "/opt/stack/ceilometer/ceilometer/api/controllers/v2.py", line 693, in statistics
    for c in computed]

  File "/opt/stack/ceilometer/ceilometer/storage/impl_sqlalchemy.py", line 517, in get_meter_statistics
    query = self._make_stats_query(sample_filter, groupby)

  File "/opt/stack/ceilometer/ceilometer/storage/impl_sqlalchemy.py", line 468, in _make_stats_query
    return make_query_from_filter(query, sample_filter)

  File "/opt/stack/ceilometer/ceilometer/storage/impl_sqlalchemy.py", line 137, in make_query_from_filter
    raise NotImplementedError('metaquery not implemented')

NotImplementedError: metaquery not implemented