parameter was covering covering `type` built in
parameter was covering covering `type` built in

Simple renaming of the parameter in order to avoid confusion
with a rather commonly used built-in `type`.

New name has added benefit of being slightly more precise.

Signed-off-by: Jiri Podivin <c67e25c244967c2b045125ef84e6068d21a6616f@redhat.com>
Change-Id: Ide35634a4a3b8fa29a677d096f66b172fa1fc9f3

openstack/python-tripleoclient