ovsdbapp 2.4.0 release

meta:version: 2.4.0
meta:diff-start: -
meta:series: bobcat
meta:branch: master
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Elod Illes <elod.illes@est.tech>
meta:release:Commit: Elod Illes <elod.illes@est.tech>
meta:release:Change-Id: I42f7f568e413cb42d22ea7158d87d27dd20e2fb6
meta:release:Code-Review+1: likui <likui@yovole.com>
meta:release:Code-Review+1: Rodolfo Alonso <ralonsoh@redhat.com>
meta:release:Code-Review+2: Elod Illes <elod.illes@est.tech>
meta:release:Code-Review+1: Slawek Kaplonski <skaplons@redhat.com>
meta:release:Code-Review+1: Lajos Katona <katonalala@gmail.com>
meta:release:Workflow+1: Hervé Beraud <herveberaud.pro@gmail.com>
meta:release:Code-Review+1: Lucas Alvares Gomes <lucasagomes@gmail.com>
meta:release:Code-Review+2: Hervé Beraud <herveberaud.pro@gmail.com>