test_lxc_simple failures in saucy smoke tests

[Para Siva]

test_lxc_simple tests are failing with today's (20130524) saucy server images. Failures could be seen on both amd64 and i386 installations.

The following error is reported,

    lxc-execute: failed to attach 'vethXhsKFB' to the bridge 'lxcbr0' : No such device
    lxc-execute: failed to create netdev
    lxc-execute: failed to create the network
    lxc-execute: failed to spawn 'test-lucid'
    FAIL

    ======================================================================
    FAIL: runTest (__main__.SimpleLxcTests)
    ----------------------------------------------------------------------
    Traceback (most recent call last):
      File "lxctest.py", line 210, in runTest
        "\nError: %s" % (r, test, e))
    AssertionError: Failed with release lucid at test lxc-execute
    Error: Failed executing /bin/true in test-lucid

    ----------------------------------------------------------------------

Steps to reproduce:
1. Install a default saucy server on a vm (either manually or preseeded default installation) with either i386 or amd64 image using KVM, libvirt
2. Do the following to install utah inside the VM
   sudo apt-add-repository -y ppa:utah/stable
   sudo apt-get update
   sudo apt-get install utah
3. Run the lxc tests using in the installed VM
     sudo utah -r lp:ubuntu-test-cases/server/runlists/lxc.run

The output yaml file and the installation log are attached.

[Para Siva (psivaa)]

Install logs