Updated openstack/openstack
Project: openstack/glance  1bea78fd9ebcd3d3c4b07f8d38076c0cd9d5b23d
null
Glance image-list failed when image number exceed DEFAULT_PAGE_SIZE

The root cause of the problem is that DB2 does not allow
an empty string ('') for datetime field. So we set the
default value of datetime as None.

Fixes bug 1245947

Change-Id: Ie372efe70a068024298fbde4574e33e565cc6c9a