Bug 10753: Any library is represented by an empty string

Bug 10753: Any library is represented by an empty string

And not with "__ANY__"

Test plan:
0/ Don't apply this patch
1/ Create a suggestion for "any library"
2/ Verify suggestions.branchcode contain "__ANY__"
3/ Apply this patch and execute the updatedb entry
4/ Create a suggestion for "any library"
5/ Verify suggestions.branchcode contain "" (for both suggestions).

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>