Updated openstack/openstack
Project: openstack/python-openstackclient  d140d8940f99f42d0cc9d2953b26726cbc096a5e

Close files on server create, add tests

The files opened for the --files and --user-data options were never
closed, potentially leaking memory in a long-running client. Close
them if they are file objects.

Add a couple of basic tests for server create.

Change-Id: I1658b0caa2d6af17308149cb52196ee28266ddf2