task/workunit: general tidy
task/workunit: general tidy

* PEP8-ize whitespace
* specialize a catch-all except:
* don't alias 'misc' to 'teuthology'

Signed-off-by: John Spray <a0ab4ec42db5a70bbcbfc74d8971c0305528d92b@redhat.com>

caibo2014/teuthology,michaelsevilla/teuthology,dmick/teuthology,zhouyuan/teuthology,SUSE/teuthology,dreamhost/teuthology,ceph/teuthology,SUSE/teuthology,yghannam/teuthology,ktdreyer/teuthology,robbat2/teuthology,dreamhost/teuthology,dmick/teuthology,yghannam/teuthology,ivotron/teuthology,ktdreyer/teuthology,tchaikov/teuthology,t-miyamae/teuthology,caibo2014/teuthology,zhouyuan/teuthology,SUSE/teuthology,tchaikov/teuthology,t-miyamae/teuthology,robbat2/teuthology,ceph/teuthology,ivotron/teuthology,michaelsevilla/teuthology,dmick/teuthology