Nexus Repo 2 makes outbound requests from npm proxy repositories that are marked "out of service"

1. Create an npm proxy repository. 
2. Right click on it and mark it as "out of service".  
3. Go "administration/logging" and add a DEBUG logger for: remote.storage.outbound
4. Make a request for npm metadata through the proxy:

http://localhost:8081/nexus/content/repositories/npm-proxy/lodash

Check the logs, and observe that an outbound request is made.

jvm 1 | 2020-02-19 13:49:14,938-0600 INFO [proxy-3-thread-2] admin org.sonatype.nexus.proxy.storage.remote.httpclient.HttpClientRemoteStorage - Initializing remote transport for proxy repository "npm-proxy" [id=npm-proxy]...
jvm 1 | 2020-02-19 13:49:49,115-0600 DEBUG [qtp2014765845-81] admin remote.storage.outbound - [npm-proxy] GET https://registry.npmjs.org/lodash
jvm 1 | 2020-02-19 13:49:49,174-0600 DEBUG [qtp2014765845-81] admin remote.storage.outbound - [npm-proxy] GET https://registry.npmjs.org/lodash -> HTTP/1.1 200 OK; 58.98 ms

Expected: Out of service proxy repositories should not make outbound requests.