openstack: Fix PEP8 violations
- E116 unexpected indentation (comment)
- E128 continuation line under-indented for visual indent
- E131 continuation line unaligned for hanging indent
- E225 missing whitespace around operator
- E265 block comment should start with '# '
- E266 too many leading '#' for block comment
- E302 expected 2 blank lines, found 1
- E303 too many blank lines (2)
- E501 line too long (n > 100 characters)
- E703 statement ends with a semicolon
- F401 'x' imported but unused
- F821 undefined name 'x'
- F841 local variable 'x' is assigned to but never used
A couple of these were actual bugs that flake8 found.