investigate using `mvn deploy` from Jenkins CI job of non-SNAPSHOT target platforms to JBoss Public Nexus so that we can have final versions rather than ongoing snapshots.

Last time I attempted to deploy something without a -SNAPSHOT suffix in its version, I got this error:

https://github.com/nickboldt/jbosstools-target-platforms/tree/d14d79e71d62b77f73d19d96e6bb1a03db90d5f1

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project multiple: Failed to deploy artifacts: Could not transfer artifact org.jboss.tools.target-platforms.jbdevstudio:multiple:pom:4.21.3.Final from/to jboss-releases-repository (https://repository.jboss.org/nexus/content/repositories/releases/): Failed to transfer file: https://repository.jboss.org/nexus/content/repositories/releases/org/jboss/tools/target-platforms/jbdevstudio/multiple/4.21.3.Final/multiple-4.21.3.Final.pom. Return code is: 502, ReasonPhrase:Proxy Error. -> [Help 1]