Updated openstack/openstack
Project: openstack/nova  e49c734e17e3ecb64e31692b77cac11e21af2e6d
null
docker: return hypervisor_version as an int rather than a string

The compute_nodes.hypervisor_version type in the database is an integer
so the docker driver needs to return the hypervisor_version as an
integer rather than a string.

Also adds the missing unit test for get_available_resource.

Closes-Bug: #1253960

Change-Id: I4e2ac13f9203b54e71f1f5cd8e15311921dd85c5