(QENG-903) Fix preinsts and install-deb-sysv-init
(QENG-903) Fix preinsts and install-deb-sysv-init

Previously `install-deb-sysv-init` was installing the redhat init script.

Also, `install-deb-preinst` and `install-rpm-preinst` were simply concatenating
the strings in the `:additonal_preinst` which I never noticed until attempting
to install from ezbake on a debian machine.

Signed-off-by: Wayne <b9526479d8e75eec48092197447318d86d2194ec@puppetlabs.com>

puppetlabs/ezbake,puppetlabs/ezbake,puppetlabs/ezbake