Dropping lower constraints testing
We facing errors related to the new pip resolver, this topic was discussed on the ML and QA team proposed to to test lower-constraints [1]. I propose to drop this test because the complexity and recurring pain needed to maintain that now exceeds the benefits provided by this mechanismes. [1] http://lists.openstack.org/pipermail/openstack-discuss/2020-December/019390.html Change-Id: I3eafc92ba7c7305b1a73d3f96c427ed12c96dbf7