- revert: Test Workaround: skip XenialTestNvme for a short time. 
    - Test Workaround: skip XenialTestNvme for a short time. 
    - pep8: fix pep8 errors found with 'make pep8' on zesty. 
    - Workaround failures caused by gpg2 daemons left running in chroot.  (LP: #1645680)
    - Install u-boot-tools when running on a system with u-boot.  (LP: #1640519)
    - block: fix partition kname for raid devices  (LP: #1641661)
    - Fix up tox errors that slipped in and new pycodestyle 2.1.0 complaints. 
    - vmtests: adjust vmtest image sync metadata filenames 
    - vmtests: Add centos support 
    - Disable WilyTestRaid5Bcache vmtest 
    - tools/xkvm: fix --netdev=<bridge> 
    - bytes2human: fix for values larger than 32 bit int on 32 bit python2.