jjb: unify configurations + provide updated jjb Debian package

This jjb Debian package version uses latest git HEAD,
includes the patch from
https://github.com/linuxmaniac/jenkins-job-builder/commit/3ca77a761fde77c383625d13d531455bdebf3fb8
(thanks, Victor!) so the unified configuration is supported and
the resulting Debian package was built against Debian/wheezy.