added date and ISBN tests to Koha.t

added date and ISBN tests to Koha.t

modified:   Koha.t

$ prove  -v ./Koha.t

1..5
ok 1 - use C4::Koha;
ok 2 - use C4::Members;
    1..6
    ok 1 - Insert data in database
    ok 2 - GetAuthorisedValueByCode
    ok 3 - GetKohaImageurlFromAuthorisedValues
    ok 4 - lost and paid works
    ok 5 - Child area works
    ok 6 - Withdrawn works
ok 3 - Authorized Values Tests
    1..4
    ok 1 - C4::Koha->can('GetDailyQuote')
    ok 2 - Got a quote based on id.
    ok 3 - Got a random quote.
    ok 4 - Got a quote based on today's date.
ok 4 - Daily Quotes Test
    1..7
    ok 1 - slashifyDate
    ok 2 - xml_escape() returns empty string on undef input
    ok 3 - xml_escape() works as expected
    ok 4 - ... and does not change input in place
    ok 5 - _isbn_cleanup removes hyphens
    ok 6 - _isbn_cleanup removes parenthetical
    ok 7 - _isbn_cleanup converts ISBN-13 to ISBN-10
ok 5 - Date and ISBN tests
ok
All tests successful.
Files=1, Tests=5,  1 wallclock secs ( 0.02 usr  0.01 sys +  0.48 cusr  0.06 csys =  0.57 CPU)
Result: PASS

http://bugs.koha-community.org/show_bug.cgi?id=5327