Updated openstack/openstack
Project: openstack/neutron  9b1cda6d34883dc5ffe63dfab7f3820bec0b18fe

Fix hostname regex pattern

Current hostname_pattern regex complexity grows exponentially
when given a string of just digits, which can be exploited to
cause neutron-server to freeze.

Change-Id: I886c6d883a9cb0acd9908495eec50bf0411d8ba8
Closes-bug: #1378450