Updated openstack/openstack
Project: openstack/python-saharaclient  2b26899813e9f64e0538d1117511f7381fdd7079

Don't set json content type for non-json data

+corresponding unit test on http client added

Change-Id: I8f2eacf595f1c73fea91b426b6c3fe6df4ad7bea
Closes-Bug: #1317259