make lint fails with pep8 1.6.0 (2015-02-06)

[Billy Olsen]

A new version of pep8 (1.6.0) was recently released which introduces some new checks. There are various violations of the new rule checks for E402 and E731.

Some examples of this are as follows:

wolsen@chaps:~/work/openstack-charms/charm-helpers$ make test
Checking for Python syntax...
charmhelpers/contrib/python/version.py:22:1: E402 module level import not at top of file
charmhelpers/contrib/python/debug.py:24:1: E402 module level import not at top of file
charmhelpers/contrib/python/debug.py:25:1: E402 module level import not at top of file
charmhelpers/contrib/python/debug.py:27:1: E402 module level import not at top of file
charmhelpers/contrib/python/debug.py:28:1: E402 module level import not at top of file
charmhelpers/fetch/giturl.py:35:1: E402 module level import not at top of file
charmhelpers/contrib/ansible/__init__.py:178:9: E731 do not assign a lambda expression, use a def
...

These need to be cleaned up.