misc/bcfg2.spec:  reconcile w/Fedora:  re-enable unit tests in EL7

EL7 deps needed for unit tests (pylibacl, python-pep8, pylint) now
built for EPEL7.

https://bugzilla.redhat.com/show_bug.cgi?id=1058427
Revert "Systemd: systemd is a replacement for chkconfig"

This reverts commit 690a18b5bb61516e5c11f6da3d788332373c196b.

While systemd is meant to replace chkconfig, it appears that RHEL7 has
both and does not provide systemd alternatives for certain SYSV init
scripts by default.
Merge branch 'maint' of https://github.com/zultron/bcfg2 into maint