Depth averaged current aggregation isn't 46/46 in UDDC

[kwilcox]

It is missing time_coverage_units and time_coverage_duration

http://tds.gliders.ioos.us/thredds/uddc/rutgers_ru05-20130815T1650-test_TimeUV.ncml?catalog=http%3A%2F%2Ftds.gliders.ioos.us%2Fthredds%2Frutgers%2Fru05-20130815T1650-test%2Fcatalog.html&dataset=rutgers_ru05-20130815T1650-test_TimeUV

Should this concern us?