Move integration tests to python-saharaclient 0.6.0

Co-Authored-By: Alexander Ignatov <aignatov@mirantis.com>
Co-Authored-By: Yaroslav Lobankov <ylobankov@mirantis.com>

Partial-Implements: blueprint savanna-renaming-service
Change-Id: I1a09613a0153c967ef44dce2dc1c4833a939657c
Merge "Move integration tests to python-saharaclient 0.6.0"