ejabberd_user: bug fixes + tests (#7033)
* ejabberd_user: bug fixes + tests
* fix changed property
* add license to handler file
* adjustments to test
* add needs/target/setup_epel to aliases
* further adjustments to integration tests
* add target to integration tests
* add some skips to test
* skip centos as it has no ejabberd
* skip fedora as it has no ejabberd
* discard unused epel setup
* add changelog frag
* remove ejabberd before tests
* fix typo
(cherry picked from commit c1f2f126cf)
Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>
