[test] Add tests for map:merge order
[test] Add tests for map:merge order

lcahlander/exist,lcahlander/exist,wolfgangmm/exist,eXist-db/exist,dizzzz/exist,dizzzz/exist,windauer/exist,dizzzz/exist,windauer/exist,lcahlander/exist,windauer/exist,adamretter/exist,adamretter/exist,dizzzz/exist,dizzzz/exist,wolfgangmm/exist,dizzzz/exist,adamretter/exist,wolfgangmm/exist,wolfgangmm/exist,windauer/exist,adamretter/exist,eXist-db/exist,wolfgangmm/exist,wolfgangmm/exist,eXist-db/exist,adamretter/exist,eXist-db/exist,eXist-db/exist,eXist-db/exist,lcahlander/exist,adamretter/exist,windauer/exist,lcahlander/exist,lcahlander/exist,windauer/exist