Correct seconds of a day from 84400 to 86400
Correct seconds of a day from 84400 to 86400

Correct a day to 86400 seconds which is used by API rate limit config
Closes-bug: #1357152

Change-Id: Ieceacd00f02b6ed27032cc0ac2f55be8b976a070

citrix-openstack-build/oslo.versionedobjects,openstack/oslo.versionedobjects