Updated openstack/openstack
Project: openstack/oslo.db  e2adc4384ab4a9ae172bdca9cfbaa5ab0ed08c68

Move to oslo.utils

`oslo.db` uses several modules(`importutils` and `timeutils`) from
`oslo-incubator`. This modules are already incubated and we should use them
from `oslo.utils`.

Change-Id: I09881ea3e115ca95bbd06ff5d1c0d5e253ed7640