Add support for hierarchical projects and fix JENKINS-17734

Hierarchical projects were previously not listed in the 'Claim Report'. Now all jobs are shown with their full name (including the folder path). This update is required to be used with the 'CloudBees Folders Plugin' or the 'CloudBees Free Enterprise Plugins'.

I have just recognized the issue JENKINS-17734, which could easily be fixed by replacing the reference to the 'All' view with the Jenkins fallback view.