Added support for handling /etc/default/buildmaster automatically

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
Added buildmaster service support

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
Added support for excluding the module when using Hiera

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
Added default values to Hiera checks

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>