API: discrepancy in format of responses for /meta/collectors/{name}

[salcock]

The bgpstream broker returns the collectors wrapped in a ` { "data" : { "collectors" : { "{name}" : { .... } } } } object, even when only a single specific collector has been requested.

In the same scenario, bgpfinder returns not only the unwrapped collector data, but also only includes the name and project fields.

Note that /meta/collectors appears to be consistent with bgpstream -- the issue is only when a specific collector is requested through the bgpfinder API.