Updated openstack/openstack
Project: openstack/sahara  f3094c92eab035e0d9807cd966ad267f08bcbfe0

Replacing data_processing with data-processing

Sahara is changing the endpoint name from data_processing to
data-processing. The Sahara docs are updated here to reflect this
change.

Change-Id: Ide6c216f939964621bdea29c5588f83c49aad103
Partial-bug: #1356053