gate-tempest-devstack-vm failed build in #5275

gate-tempest-devstack-vm failed build in #5275 due to Hash Sum mismatch.

https://jenkins.openstack.org/job/gate-tempest-devstack-vm/5275/consoleFull

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08:29:22 Get:72 http://mirror.rackspace.com precise-updates/universe TranslationIndex [2,850 B]
08:29:22 Hit http://mirror.rackspace.com precise/main Translation-en
08:29:22 Hit http://mirror.rackspace.com precise/multiverse Translation-en
08:29:23 Hit http://mirror.rackspace.com precise/restricted Translation-en
08:29:23 Hit http://mirror.rackspace.com precise/universe Translation-en
08:29:24 Get:73 http://mirror.rackspace.com precise-updates/main Translation-en [163 kB]
08:29:24 Get:74 http://mirror.rackspace.com precise-updates/multiverse Translation-en [1,600 B]
08:29:24 Get:75 http://mirror.rackspace.com precise-updates/restricted Translation-en [1,083 B]
08:29:24 Get:76 http://mirror.rackspace.com precise-updates/universe Translation-en [67.2 kB]
08:29:24 Fetched 20.5 MB in 21s (953 kB/s)
08:29:25 W: Failed to fetch bzip2:/var/lib/apt/lists/partial/mirror.rackspace.com_ubuntu_dists_precise-updates_main_binary-amd64_Packages Hash Sum mismatch
08:29:25
08:29:25 W: Failed to fetch bzip2:/var/lib/apt/lists/partial/mirror.rackspace.com_ubuntu_dists_precise-updates_universe_binary-amd64_Packages Hash Sum mismatch
08:29:25
08:29:25 W: Failed to fetch bzip2:/var/lib/apt/lists/partial/mirror.rackspace.com_ubuntu_dists_precise-updates_main_binary-i386_Packages Hash Sum mismatch
08:29:25
08:29:25 W: Failed to fetch bzip2:/var/lib/apt/lists/partial/mirror.rackspace.com_ubuntu_dists_precise-updates_universe_binary-i386_Packages Hash Sum mismatch
08:29:25
08:29:25 E: Some index files failed to download. They have been ignored, or old ones used instead.
08:29:25 ++ failed
08:29:25 ++ local r=100
08:29:25 ++ set +o xtrace
08:29:25 Build step 'Execute shell' marked build as failure
08:29:27 Archiving artifacts
08:29:46 Recording test results
08:29:47 Triggering a new build of devstack-update-complete #7877
08:29:47 Notifying upstream projects of job completion
08:29:47 Finished: FAILURE
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