test: Clean up test for copy()
test: Clean up test for copy()

Merge the 'copy( Array )' and 'copy( Object )' test suites to
reduce duplication. Differentiate between Array and Object at
the root. For all the nested cases we only need to test them with
array or object, not both. Kept one test to ensure mixed
arrays/objects work.

Change-Id: Ib6c2422590e12c53923428524bcfdff1efde3ff9

iSCInc/oojs,wikimedia/oojs,wikimedia/oojs