Updated openstack/openstack
Project: openstack/oslo.db  1c5019b0be48c8f6f7e89e1fb7a2e590db205983

Use explicit loops instead of list comprehensions

Changes only the places where list comprehensions were used instead of loops
and their return values were not used

Change-Id: Ib518e77b26cf61cac4acb6a7e9b851aafffcd855