resource delete, resource update, execution cancel, better ID gen

• implemented resource delete
  • delete capabilities for A.Requests, A.Results, Contributions (analysis only), SUT (compilation only)
  • Requests, Results, and SUTs recognize a "cascade" parameter which when set to "true" makes it so that deleting any one of the three will result in all three getting deleted
  • deleting a resource that is connected to a directory or a file will also delete the file/directory (SUT, contribution, A.Result)
  • deleting an Automation Request that is not yet finished results in the request getting canceled first (using desiredState update), unfinished Automation Results can not be deleted
• implemented resource update
  • update capabilities for A.Requests, A.Results, Contributions (analysis only), SUT (compilation only)
  • not all properties can be updated
  • properties can not be changed before execution finishes, except for the desiredState property of AutomationRequests
• implemented execution cancel
  • cancel Automation Request execution by updating the A.Request's desiredState property to "canceled"
  • canceling only works on requests that are still state "inProgress"
• reworked resource ID generators
  • now use long instead of int
  • initialization is based on a special bookmarkID resource instead of walking the whole triplestore