This update for akonadi-server fixes the following issues:

- SUSE Linux Enterprise Desktop doesn't include mysql/mariadb but SUSE Linux Enterprise Server does.
So make mysql a Recommended (instead of Required) package when building for
Backports and add a patch that checks in runtime if mysql is
available before setting it as the default database and if
it's not, use the QSQLITE3 driver (boo#1172539). Patches already
submitted and approved by upstream.