Bug 21076: Don't call autocomplete code after patron found

Bug 21076: Don't call autocomplete code after patron found

To test:
1 - Enable article requests
2 - Search on staff client
3 - Click 'Request article'
4 - Find a patron
5 - View error in console
6 - Apply patch
7 - Reload
8 - Not error is gone

Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Followed the test plan and it works.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 5a9bad787458411c790d26b3b115fe3e7e2e0ab2)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>