Enable wait_for_dns

See freeipa commit 34fc447c00189d53ccf44184cfd5ed48cde6bf86
Use job prefix in install-built-rpms
Fix typo in check-deps→caless trigger
Move project definition to a template file

This means that every developer can create her own namespace of jobs
on a Jenkins instance without overwriting the "official" ones.
Also, my e-mail address is finally not hard-coded in the config.
Add {prefix} to the docs job
Add sudo integration job