Bug 7442 (follow-up) ensuring that summary is display when searching on all types...

Bug 7442 (follow-up) ensuring that summary is display when searching on all types of authorities

This patch corrects a small bug :

Authorities search on all types does not show summary because it is computed
with selected type (which is empty) instead of using found authority type.

Test plan :
- Go to intranet autorities search
- Perform a search on all authorities types
- Look at results
  => Without this patch, results rows do not display the autority summary, only
     authorized headings

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>