Updates excutils module from oslo-incubator

Change-Id: I75c96d5db01fd6b8d0b22638d3fdccef149d5b47
Related-Bug: #1290849
Updates fileutils module from oslo-incubator

Change-Id: Ieae8da571a6f03e70a0539472e374babe05d1f22
Related-Bug: #1290849
Updates log module from oslo-incubator

Updates log module from oslo-incubator.
Updates sample config file for tuskar

Change-Id: Ie6b4aa38885e0f8e4b44b49e96ac0852e51166ab
Related-Bug: #1290849
Updates lockutils module from oslo-incubator

Updates lockutils module from oslo-incubator.
Adds posix_ipc to requirements.
Related-Bug: #1290849

Change-Id: I61ac9e917e8551102dc59cc590fd88fa696c54ac
Updates fixture module from oslo-incubator

Change-Id: I414bfd3237d47b6fb1e40db1e9d500c8797f38b2
Related-Bug: #1290849