Fix mysqladmin failure for Fedora 34 and mariadb

mysqladmin is incorrectly installed in Fedora 34 with mariadb. This
causes the failure of Zuul Fedora based jobs. The issue is a conflict
between mariadb and community mysql that is described in [1] and [2].

The workaround is to explicitly install package "mariadb"

Also configure an increased swap size like for the other platform jobs
in order to avoid OOM issues.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2026933
[2] https://lists.launchpad.net/maria-discuss/msg06179.html

Closes-Bug: #1956116
Change-Id: Icf6d7e1af5130689ea10b29d37cc9b188b2c9754
2 files changed