CI: Add eventing management retries

The main problem area with testing eventing function management is with deploy, pause, resume and undeploy. These tests look to consistently timeout or fail w/in the Jenkins integration pipeline. For this change, move the deploy, pause, resume and undeploy tests into a nested describe so that we can add retries around this functionality. The nested describe allows for the before to create a new function and the after to drop the function (necessary for allowing retries).