Fix plugin load error due to Popen returning binary data. Other fixes listed
below

sos/plugins/anacron.py:
  - add one line description during verbose output for anacron

sos/archive.py, sos/utilities.py:
  - make sure to return a string after a Popen call
    which initially returns binary

sos/plugins/named.py:
  - Remove unused import of commands

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
Fix unittests to report on strings and not binary

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>