Fix various pylint warnings

There were multiple issues:
  - copy-paste resulted in wrong indentation
  - wrong function name
  - missing spaces around assignment
  - overriding built-in names (type, dir) or already defines ones
    (errors, hypervisor)

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>