fix: fix all the spec errors! at least TG API is COMPLIANT now

.../textgrid/middleware/IdentifierListDelivererAbstract.java

...nfo/textgrid/middleware/IdentifierListDelivererIdiom.java

...tgrid/middleware/MetadataFormatListDelivererAbstract.java

...fo/textgrid/middleware/MetadataFormatListDelivererDH.java

...fo/textgrid/middleware/MetadataFormatListDelivererTG.java

...re/src/main/java/info/textgrid/middleware/OaipmhImpl.java

...c/main/java/info/textgrid/middleware/OaipmhUtilities.java

...n/java/info/textgrid/middleware/RecordDelivererIdiom.java

.../java/info/textgrid/middleware/RecordListDelivererDC.java

...info/textgrid/middleware/RecordListDelivererDatacite.java

...va/info/textgrid/middleware/RecordListDelivererIdiom.java

...extgrid/middleware/test/online/OaipmhUtilitiesOnline.java

...extgrid/middleware/test/online/tg/TestTGBasicsOnline.java

...grid/middleware/test/online/tg/TestTGGetRecordOnline.java

...iddleware/test/online/tg/TestTGListIdentifiersOnline.java

...id/middleware/test/online/tg/TestTGListRecordsOnline.java

oaipmh-webapp/src/main/webapp/WEB-INF/beans.xml