Don't pass argument sqlite_db in method set_defaults
Don't pass argument sqlite_db in method set_defaults

Config option sqlite_db is deprecated for removal[1],
so don't need set its default value.

[1]https://github.com/openstack/oslo.db/blob/\
0a1bae9859079fb21a03716be947c5f1da6db0a2/oslo_db/options.py#L17

Change-Id: Ie1e94e03013e8f1e47bbc1cd12f8d1b81a4cb24e

igor-toga/local-snat,openstack/neutron,huntxu/neutron,huntxu/neutron,sebrandon1/neutron,sebrandon1/neutron,openstack/neutron,eayunstack/neutron,mahak/neutron,igor-toga/local-snat,cloudbase/neutron,mahak/neutron,openstack/neutron,noironetworks/neutron,cloudbase/neutron,noironetworks/neutron,mahak/neutron,eayunstack/neutron