Gradle plugin should not hardcode task dependencies

[erdi]

Currently the Gradle plugin hardcodes dependencies from resolve task to classes, compileJava, compileTestJava, and testClasses tasks. There is no need to do any of that because the task dependencies will be inferred by Gradle based on the value of that task's classpath property. In my particular case this prevents me to be able to configure inclusion of the generated Open API specification as a resource of the main source set because it's causing circular task dependencies.

[nbrugger-tgm]

here is a fix: #4761

disclaimer: i am not an author or maintainer so who knows if this will be merged