Bug 17578: GetMemberDetails - Remove amountoutstanding

Bug 17578: GetMemberDetails - Remove amountoutstanding

The amountoutstanding value set by GetMemberDetails was only used in a
few places. In that case it makes sense to only retrieve it when needed.

Test plan:
1/ Add fines to a patron, on the OPAC patron info page, you should see a
"Fines" tab
2/ Add credit to a patron, you should see the credit displayed
3/ Set the pref maxoutstanding to 3
4/ Add a fine of 4 to a patron
5/ Try to place an hold for this patron
=> You should get a "too much oweing" message

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>