Bug 8258: Use patron's library's notice for DUEDGST and PREDUEDGST

Bug 8258: Use patron's library's notice for DUEDGST and PREDUEDGST

If a notice is defined for the library of the patron, it should be
used.

Without this patch, the notice used is the one defined for all
libraries.

Test plan:
1/ Set the advanced notice for a patron using digest.
2/ Check one item out to this patron (backdate the return date according
the days in advance value).
3/ launch advance_notices.pl -c
4/ Verify the notice used is the default one.
5/ Define a notice for the library of the patron for PREDUEDGST
6/ launch advance_notices.pl -c
7/ Verify the notice used is the one previously defined.
8/ Check one item out to this patron (date due = today)
9/ launch advance_notices.pl -c
10/ Verify the notice used is the default one.
11/ Define a notice for the library of the patron for DUEDGST
12/ launch advance_notices.pl -c
13/ Verify the notice used is the one previously defined.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests  and QA script.
Test case: User from Library A, checked out books
- in library A from A and B
- in library B from B
Verified, that the 'all libraries' notice is still used,
when no specific notice is defined.
Verified, that the patron's home library noticed is used,
when defined.

Note: Before and after the patch we print the branch information
from the patron's home library, so also using the template from
this branch, seems logical. All items over all branches are
processed into one single reminder email, before and after the patch.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>