outreach does not detect http global configuration changes

Configure nexus with proxy host a.proxy:8888.
Disable Caching in the outreach capability. ( only required to make validation easier )
Configure org.apache.http logger at DEBUG level.
Trigger an outreach bundle fetch ( reload welcome page )
Notice proxy is used :

jvm 1 | 2015-06-12 17:05:07,071-0300 DEBUG [qtp333052202-88] anonymous org.apache.http.impl.execchain.MainClientExec - Opening connection {}->http://a.proxy:8888->http://sonatype-download.global.ssl.fastly.net:80

Change the http proxy in nexus to be b.proxy:8888 and save.
Trigger an outreach bundle fetch again.
Notice that the connection is still being made to a.proxy and not b.proxy.

Expected: b.proxy should be used for all existing connections.