Nachi Ueno c9af623025 Import lockutils and fileutils from openstack-common
File lock function is needed to support iptables-based security group
implementation.

This is used by bp quantum-security-groups-iptables
Change-Id: Id9c116a1e10e5c240913fae7a127110b806eff0f
2012-11-08 14:31:44 -08:00
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