Bulk Data 2.0.0 Export Response needs updates to PollingLocationResponse

[prb112]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

http://hl7.org/fhir/uv/bulkdata/export.html#response---complete-status

Missing:

deleted | optional | JSON array

This is split out from #1927 as it may be used by conformance tools to check that this array exists.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Acceptance Criteria

1. GIVEN [a precondition]
   AND [another precondition]
   WHEN [test step]
   AND [test step]
   THEN [verification step]
   AND [verification step]

Additional context
Add any other context or screenshots about the feature request here.

[prb112]

3087 should show a new empty array called deleted. This is so conformance tools (as they are updated pass). We don't actually populate the field.

    Update polling response to match http://hl7.org/fhir/uv/bulkdata/export.html#response---complete-status
    Ensure conformance with anticipated deleted array.

[d0roppe]

verified the empty array is part of the $bulkdata-status of a completed $export. Closing the issue