No plugins error on service startup

Issue

When starting a service with plugins, the following error appears:

org.pf4j.util.FileUtils         : Expanded plugin zip 'armory-observability-plugin-v1.2.0.zip' in 'armory-observability-plugin-v1.2.0'
org.pf4j.AbstractPluginManager      : No plugins

Cause

Service starts with a different User ID vs Spinnaker User ID and is unable to run certain commands (eg. unzipping the plugin folder).