Updated openstack/openstack
Project: openstack/neutron  f34e2572d6a400e7f98e76dc3d99ebb04435ab07

Datacenter moid should not be tuple

Remove the comma, because it will convert the string to tuple
Closes-bug: #1362480

Change-Id: I2debb76bae26fe3d437a431f2946f66a1cbe6851