[receiver/aerospikereceiver] Namespace names not parsed from response

[antonblock]

Describe the bug
The aerospikereceiver parses a delimited string response into a map of metric values. In the parsing of the INFO response, namespaces were not being added to the map. The result of this is the namespaces not being collected.

Steps to reproduce

• Collect from an Aerospike system with at least 1 namespace

What did you expect to see?

• There should be metrics collected specifically for each namespace

What did you see instead?

• The namespaces weren't collected

What version did you use?
Version: v0.54.0

What config did you use?

receivers:
  aerospike:
exporters:
  otlp:
    endpoint: 0.0.0.0:9124
service:
  pipelines:
    metrics:
      receivers: [aerospike]
      exporters: [otlp]

**Environment**
Any