Slack step execution is ignoring http proxy configuration

[alexKarahalios]

The problem is that plugin step does not take into consideration the following jvm arguments
-Dhttp.proxyHost=.. -Dhttp.proxyPort=..

that we set in the plugin-javaops.conf in order to enforce execution of all the http calls from agent plugin step process to slack API, through an http proxy

Looks like this is expected for the version of HttpClient used in the plugin code to make the http request

https://stackoverflow.com/questions/5165126/without-changing-code-how-to-force-httpclient-to-use-proxy-by-environment-varia

[nhmathis]

If you wish to test locally, you'll need to make a few changes.

1. Update the build.gradle file to HttpClient 4.2: https://github.com/IBM-UrbanCode/Slack-UCD/blob/0cbab0c196880e4d922ed7d8fdccfcabca2772d5/build.gradle#L66

2. Update all mentions of lib/commons-httpclient-3.1.jar to lib/commons-httpclient-4.2.jar in the plugin.xml: https://github.com/IBM-UrbanCode/Slack-UCD/blob/0cbab0c196880e4d922ed7d8fdccfcabca2772d5/src/main/zip/plugin.xml#L55

3. Recompile and install.

That's a quick way to confirm your Issue.

[nhmathis]

Beware: There may have been deprecated or removed classes that I am unaware of since 3.1.