Match created_at and updated_at timestamp in TestHashRing
Match created_at and updated_at timestamp in TestHashRing

When a "ovn_hash_ring" record is created in the database,
there is a small difference between "created_at" and
"updated_at", assigned during the Python OVO creation.

This patch equates both values during testing if the
difference between both is less than 10ms.

Related-Bug: #1894117

Change-Id: Ib3b405104d746255f869a94898d4ba14ac600909

mahak/neutron,mahak/neutron,openstack/neutron,openstack/neutron,mahak/neutron,openstack/neutron