Removes redundat flag in Win32 netwok call

Removes redundant GAA_FLAG_SKIP_ANYCAST.
Fixes Python 3.x support in test_winrmconfig

Adds sorting to lists to be compared and some minor refactoring.
Adds Python 3.x support for map calls

Wraps map() calls with list() where considered necessary.
Adds Python 3.x support to userdata script

Replaces six.StringIO with io.BytesIO in gzip inflation.
Marks also content as bytes where necessary.