[receiver/aerospikereceiver] Single node mode with authentication crashes if auth fails.

[dwelch-spike]

Describe the bug
When running a pipeline with the Aerospike receiver with collect_cluster_metrics set to false and username and password empty, the receiver will crash if auth fails with Aerospike error NOT_AUTHENTICATED. Incorrect passwords are fine but no user/pass gets NOT_AUTHENTICATED

Steps to reproduce

1. Configure the receiver with collect_cluster_metrics == false and no username or password.
2. Connect to an Aerospike host with authentication enabled.
3. wait for scrape_interval.
4. observe crash.

What did you expect to see?
A logged warning containing the NOT_AUTHENTICATED error.

What did you see instead?
panic: runtime error: index out of range [1] with length 1

What version did you use?
Version: main at 9b2a885

What config did you use?

receivers:
    aerospike:
      endpoint: "172.17.0.7:3000"
      tlsname: ""
      collect_cluster_metrics: false
      collection_interval: 5s
      username: ""
      password: ""

processors:
  batch:

exporters:
  logging:

service:
  telemetry:
    logs:
      level: "debug"
  pipelines:
    metrics:
      receivers: [aerospike]
      processors: [batch]
      exporters: [logging]

Environment
OS: macOS 11.3.1
compiler: go version go1.18.2 darwin/amd64

Additional context
This crash happens because the Aerospike Go client single conn struct's RequestInfo method won't return an error if not authenticated, instead an error message is set in the key of the map return value. The client's allNamespaceInfo method assumes the keys in RequestInfo's return value look like namespace/<name> and splits on "/" then takes the index [1] causing an index out of bounds crash.

This should be fixed by checking for the "ERROR:" suffix in responses an returning an error if it is found.

[dwelch-spike]

I'm working on a fix for this now.

[github-actions]

Pinging code owners: @djaglowski @antonblock. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[dwelch-spike]

resolved by merged PR