[plugins] more pep8/pyflake plugin cleanup

There's a lot of changes, however, it is primarily formatting of existing
code and no new code is introduced.

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
[plugins] pep8 compliance for rest of plugins

All plugins should now be in compliance with pep8

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
[utilities] pep8 compliance

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
[policies] pep8 compliance

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
[travis-ci] run pep8 against code tree

To ensure proper code formatting and syntax is being done this enables
travis-ci to continually check pep8 compliance. This is useful as it will tend
to spot a lot of syntax errors that the unittests may not pick up.

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