TS/TJ: use None in parameter value.
TS/TJ: refactored oaiSelect to return result object. Removed magic +1 for batchSize.
TJ/TS: test mocking reduced in OaiListTest.
TJ/TS: identifier rename for oaiSelectResult object.
TS: whitespace cleanup.
TS: reopen after 10000.
TS/TJ: small refactorings to clear _OaiSelectResult object (a bit).