Currently the Gradle configurations managed by the Gradle JPI plugin contain JPI/HPI and JAR dependencies. JPI/HPI dependencies are not supported by Gradle. To improve the design, configurations should either contain JPI/HPI or JAR dependencies. The existing jenkinsPlugins and optionalJenkinsPlugins should only contain JPI/HPI dependencies and should not be part of the standard configuration hierarchy. The jenkinsTest configuration currently contains plugin dependencies (JPI/HPI) and the Jenkins Test Harness (JAR). It must be split into a jenkinsTestPlugins configuration only containing JPI/HPI dependencies and the jenkinsTest configuration containing the Jenkins Test Harness.