Bug 15930: Make patron searches defaulting on 'contain'

Bug 15930: Make patron searches defaulting on 'contain'

The default patron search types has changed from 'contain' to
start_with. Users consider it as a bug.
This patch revert the previous changes to default on 'contain'.

Test plan:
Search for patrons in different places (guarantor, checkout, patron
module, acquisition module, etc.) and confirm that the default is always
'contain'

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jesse Weaver <jweaver@bywatersolutions.com>
Signed-off-by: Brendan Gallagher <bredan@bywatersolutions.com>