event configuration: load default values from configuration directory

Load event configuration files from EVENT_CONF_DIR, where the files are
actually placed, instead of EVENT_DIR, which contains on XML event
definition files.

Closes rhbz#1062239

Signed-off-by: Jakub Filak <jfilak@redhat.com>
testsuite: xml translations

Related to rhbz#909536

Signed-off-by: Jakub Filak <jfilak@redhat.com>