[SECURITY] Fedora 21 Update: jenkins-1.590-3.fc21

Jenkins is an award-winning application that monitors executions of repeated jobs, such as building a software project or jobs run by cron. Among those things, current Jenkins focuses on the following two jobs: - building/testing software projects continuously. In a nutshell, Jenkins provides an easy-to-use so-called continuous integration system, making it easier for developers to integrate changes to the project, and making it easier for users to obtain a fresh build. The automated, continuous build increases the productivity. - monitoring executions of externally-run jobs, such as cron jobs and procm ail jobs, even those that are run on a remote machine. For example, with cron , all you receive is regular e-mails that capture the output, and it is up to y ou to look at them diligently and notice when it broke. Jenkins keeps those out puts and makes it easy for you to notice when something is wrong.