Replacing data_processing with data-processing

Changing data_processing with data-processing where needed to match the
new defined endpoint of Sahara.

Co-Authored-By: Sergey Reshetnyak <sreshetniak@mirantis.com>
Co-Authored-By: Yaroslav Lobankov <ylobankov@mirantis.com>

Closes-Bug: #1356053

Change-Id: Iba45c15ed57d43a11e6fac74d75d6b2db46f6a2f
1 file changed