Bug 13940 : Testing C4::OAI::Sets

Bug 13940 : Testing C4::OAI::Sets

Testing C4::OAI::Sets in t/db_dependent/OAI/Sets.t
Adding &DelOAISetsBiblio in @EXPORT at the beginning
of OAI/Sets.pm, it was the only one missing

TEST PLAN
---------

1. Apply patch
2. prove -v t/db_dependent/OAI/Sets.t
-- All 145 tests should run successfully without any error or warning
3. Run koha qa test tools
   -- No issues found.

Additionally, I comfirmed why DelOAISetsBiblio was added in
the list of exported functions.

$ grep "^sub " C4/OAI/Sets.pm | sort > check1
$ for i in `grep "\&[A-Z]" C4/OAI/Sets.pm | xargs `; do echo $i; done | sort > check2

Of course the outputs have a little extra around them, so
$ vi check1
$ vi check2
$ diff check1 check2

Lo and behold, it was that one function. Necessary for 100% coverage.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>