(maint) Remove outdated references to puppetdb and dujour

Since some of our files originated in these projects there were a few outdated
strings or bits of code that referred to them.
(maint) Note need for Java 7 in defaults file
(NC-167) Add systemd support
(NC-167) Move init script logic into packages

Having complex logic in the makefile to determine platform-specific init
script installation was proving too complex.
Merge pull request #46 from pcarlisle/nc-167-systemd

(NC-167) Add systemd support