Null in list of providers

[jaybarra]

There is a null value in the list of providers being returned from the https://cmr.earthdata.nasa.gov/search/providers endpoint.

To replicate

curl -XGET https://cmr.earthdata.nasa.gov/search/providers | jq -c '.items[4]'

Compare to other entries

curl -XGET https://cmr.earthdata.nasa.gov/search/providers | jq -c '.items[3]'