PEP8 fixes on codebase

I tried to keep commits short and organized, so you can cherry-pick the ones you want, if you disagree with some. I haven't tackled the following two suggestions:
  ./snf-common/synnefo/lib/dictconfig.py:253:83: E721 do not compare types, use 'isinstance()'
  ./snf-common/synnefo/lib/dictconfig.py:473:87: E721 do not compare types, use 'isinstance()'
because I was unsure of the correct "classinfo" to be used.

I also noticed that you use wrapping on columns 80 and 120 on different files. 
Is there any reasoning behind  the distinction or it's just code before a style change?